I feel as if I'm in bizarro world after reading that post. Your position in simple terms: instead of driving in this sim game with a sim steering wheel and turning your head in sim fashion in order to look out the sides of your sim windows, you want us to believe that it is "more immersive" (your words) to drive with a control pad and turn your head with a thumbstick? If only Henry Ford learned of your idea before he invented the first automobile since he was obviously doing it wrong. XD
Reading the entire write up where you even try to say 3D is less immersive just to slam everything about the Gran Turismo makes me think you should have saved yourself the effort by simply writing "teh Sony sucks". Those three words alone at least gets right to your point, which is what all that was about.
Will GT5 be a perfect sim game? Of course not because that's impossible. But I'll maintain that it is far "more immersive" to drive with your hands on a wheel while using your head for looking to the sides than it is to use a game pad to drive while twiddling around with a thumbstick to look to the sides. One is far closer to reality than the other, and if you can't figure out which one then I really can't help you.
Neither a controller or a wheel is anywhere close to actually driving a real car. Pretending to drive one where you're playing with little toy representation of things (which fail at actually being realistic), in a game that isn't super realistic (it is for a game, but video games by nature are not terribly realistic), well I just want whatever control allows me to immerse myself in the game.
Personally, because even good wheels are still nowhere close to being realistic, they absolutely do cause less immersion for me, because then I'm thinking about all the feedback that's missing and how its not realistic than I am focused on the game. The controller enables a natural extension of what my mind is thinking. My mind is immersed and is thinking okay, sweeping corner then a hairpin, and is thinking about the best line and braking and acceleration, its not thinking about the controller at all. With time, I might be able to get that way with a wheel, but there's no point to it for me, as the controller isn't a hindrance to me at all.
As others pointed out, when looking in your mirrors you're moving your eyes more than your head, so this is basically the opposite of reality. More realism by making it less realistic?
I didn't say 3D isn't immersive, I said when using this with 3D it will cause a break in the immersion 3D does offer.
So, yes, I'd rather they focus on the stuff that actually does immerse me in a game, and make the core game good, rather than try to augment things with poor gimmicks that fail at realism. It is after all a game, and not an actual simulation (and no matter how much realism they claim, fact is they're far closer to where they started than they are to reality, which is actually unobtainable with current technology, let alone for a cheap video game system).
I don't have that big of a problem with the lip service they give reality, but I'd rather have a game I could play now, and then get little add-ons that I don't care about later on. And if I feel the core game has issues then I'm going to think they wasted too much time on junk features. For instance, GT4, they for some reason felt they had to completely rewrite the game engine, which to me was unnecessary and forced them to take much longer to finish the game.