THIS! I really grappled with whether or not I was going to preorder and then the day before release I bit the bullet. I too was one who was at first disappointed with the lack of cars in GTS. Then looking back on it, I thought about how much I really used any of them. I would say that 95% of the people who played GT6 drove more than half the cars in the game. I get that the apparent "spirit" of Gran Turismo had become collecting cars, but was that really what the game was suppose to be?
What really made me buy this game was that I had to open my mind to new possibilities. My PS3 died less than 3 months after GT6 came out so I hardly played it. I made the decision to invest in a PS4 instead which came with Far Cry 4, thus expanding my genre of gaming. Since I've owned my PS4 I haven't owned a single racing game. On PS3/2 I was playing almost exclusively racing games, more so exclusively GT series games. There are so many great games out there that I wasn't giving a chance because I was only utilizing 1 genre. After having expanded my gaming experience so much over the time I've had my PS4, I can go into GTS knowing it won't be the same, but willing to be open to the new experience it offers.
The old GT format is dead. For the time being at least. You can't keep living in the past guys. PD realized this and is broadening their approach to their games, something I respect. I'm not going to let the fact that the game different from older GT games take away from what I think will be a great game in its own right.
Briefly played the demo, just not much because I didn't have the time. I'm sitting here surfing GTP until the game comes in. According to the tracking, it's out for delivery!