Quite frankly, I'd rather Polyphony stop wasting their time developing demos, then having to translate demos because people can't just wait a couple more months, which in turn (shock of all shocks) delays development of the finished product! Which, also surpsingly, is something people complain about a lot as well, when their precious finished product is pushed back.
And I don't feel like shelling out money for a game that will have zero replay value once the real thing comes out, because this thing is still nothing more then a demo. And I already plan to get the game (most likely), so I can wait, save money, and still get the real thing!
Some people just seem to want everything their way. Well getting things your way gets in the way of us getting the main thing we all want: Gran Turismo 5.