Windshield cam needs a hood. Windshield cam need rain on it and wipers. Windshield cam might be fun if it showed JUST enough roof and dash so that it was the correct dimensions for the actual windshield's full width or at least more of it than cockpit cam shows.
Windshield cam might be fun if the center seat position was moved to the side. In other words, place the speedo and tach towards one side, and then sit slightly off center. Not as much as a real car, but a hair might be fun (so that your view of the hood was a bit less central (except for the F1, of course!). The main thing is judging those apexes.
Right now, in hood ornament cam (bumper cam if you want to use the old, incorrect term), as a rough guide, the outsides of the speedo and tach act as edge indicators. Basically, if you run in a line and the tach or the speedo go over the rumble strip, you'll just hear it. Rumble strip to the outside of the instruments, no rumble. It's not precise, but it's a pretty good rough guide. The thing is, it's where the car WILL be, but far further forward than if you were looking out and saw your hood IRL. That's tucked more out to the sides. So, in essence, the tach and speedo are the corners of your car about a few feet IN FRONT of the car. My head is spinning from all this!
Now, Chromatic and Captain Roh's pictures are fascinating. First of all, yes, there's your proof that 'bumper' is actually driver eye height (but anyone that's ever watched a REAL bumper cam on TV knows that is is much lower to the ground and severely exaggerates the apexes and rumble strips), but Catain Roh's pictures seem to question the very position of '(in front of the) windshield' cam. Is it off to the side, or not? I think it does show that it is in the center of the car. If Chromatic's double exposure was slipped so that the windshield cam's instruments were in the center, rather than superimposed on the cockpit cam's instruments, perhaps those double lines and the such WOULD line up right, and that would account for why one car was further over than the other in Captain Roh's picture.
It certainly FEELS like the central position, you'll feel the rumble strips equally as they go JUST under the speedo or the tach. Me, I'd like it moved, maybe not QUITE to out as far as the cockpit cam, so I have more of a sense of not being smack dab inb the middle. I've never driven an F1, never really been in a single seat race car (although long ago I DID have a little go in karts), and am, like all of us, mostly used to having a bit more car on one side of me than the other.
Maybe, after PD model a hood and a little roofline, put the weather on the OUTSIDE of the windshield and bring back the wipers, they could put the windshield camera off center (as an option, maybe?)...
To be honest, I hate to say it, but they should just go and take a good look at Shift 1. Their hood cam was just about right. No invisible car, and generic speedo and tach. The right one for each car. Mind you, yes, it was still central, but I had a MUCH more 'connected' feeling to it. It wasn't as extreme as cockpit cam, but at least I still FELT I was driving a car around, not a Steady-Cam in front of a moving point, with magical instruments hovering disembodied in thin air!
Add rain and wipers to that view, and just a BIT of surround (if it's going to be central) and you have something that could be WAY more immersive than it is, while still giving you a less restrictive view than cockpit. Even with a HANS on and a helmet, you can still usually see the whole windshield. My view certainly isn't cut off just to the far edge of the center mirror! And VERY little head movement increases that even further.
Real estate on an HDTV is limited. I know Kaz LOVES all that detail modeling, but there just isn't room for it all AND give you what you would perceive actually sitting there without that being a monster TV basically as wide as your car (and a bit wider to get in the pillars and side window bit)! No-one can afford that. So, I'm sorry, but in cockpit view, I always get the impression I am sitting in the back seat, or wearing someone else's glasses prescription, that makes everything look further away! And someone has stuck blinkers on me.
Trust me on this one (or go play Shift and take a look for yourselves), but windshield cam, if it DOES show the hood and enough bodywork to start shaking around as you get faster and go over bumps (rather than GT'5 the car stays stable as your HEAD starts shaking around!), and this can be VERY immersive without restricting your view as much as cockpit cam...
Is it perfect...? No. But it's no more WRONG than cockpit cam, IMO. Combined with the visual jostling, which I think is the thing that cockpit view drivers feel as the main thing that gives them an impression of SPEED and immersion, even though they might THINK it is seeing all the cockpit details. It is them moving around.
Shift, IMO, got it right. You vision doesn't blur as much as the car vibrates and shakes. If it did, you couldn't drive.
The hell of it all, I suppose, is NEITHER view in GT5 is any good. Cockpit is too restrictive for real life, and (invisible) hood cam is too stable and disembodied.
JMO