you are also being rude with the fact "Polyphony know more then all their fans"
I'm not rude. I'm just making logical conclusion driven by the presumption that group of people who are leading the game design in PD - not Yamauchi himself - are probably a decade ahead of us with ideas, concepts and suggestions.
I can make that conclusion, because GT series track-records clearly shows it.
And with deep respect to all people - as being driving-racing fan for decade and the half now, with numerous racing titles played - I still haven't find ANY GREAT and INNOVATIVE idea on any forum I've visited in last decade of existance of commercial internet and communities (even in the legendary times of Kenji's granturismo.com).
There were good ideas, intriguing concepts and such, but nothing was GROUNDBREAKING - and 99% of suggestions were just gameplay or structural concepts already seen in other racing titles.
Which leads us to my main point that you didn't understand in full.
Gran Turismo series track-record is a clear example od groundbreaking ideas that comes form game designers in Polyphony - Takeshi Yokouchi, Hirotaka Komiyama, Tomokazu Murase, Yuichi Matsumoto, Masaaki Goto, Yamauchi himself and all other people involved.
First game gave us fully detailed concept of racing "normal" cars in favour of their racing-counterparts as was dominant in genre. It also offered prefectly implemented idea of "tuning" the cars (up to infamous Racing Modification), as well as overall idea of OWNERSHIP - which is the main philosophy behind all Gran Turismo games so far. Car Wash (and it's influence on aerodynamics) and Used Cars - with idea of "days" that pass inside the game structure - are just of few groundbraking concepts of the first GT game. Idea of Liceence Test - with it's complexity - is also groundbraking, as well as it was the whole Gran Turismo World mode - which is today a standard in genre.
GT2 gave us enourmously detailed Time Trial concept, still unprecedeneted on both consoles and PC. Shame it didn't appeared in such design in any game after GT2. Also, groundbraking fact of GT2 was sheer number of cars and tracks.
GT3 pushed further concept of ownership, with Oil Change, idea of tracking the mileage for each car and counter-effect of mileage on engine/car condition.
GT4 made a final effort in that area, with introducing the chasis-wear, recyling of car and expanded concept of owner's maintenance of the vehicle. It aslo gave us groundbraking concept of trainable virtual-driver (B-Spec mode) - cocept which will hopefully be expanded in GT5, together with concept of the ownership.
PhotoMode was also great, but it was already made before in SegaGT2002 game, so it was not 100% groundbraking. But, the ability to make a photo in the way GT4 gave us - and wiith option to save the photo on USB stick or print it put directly form PS2 - was groundbreaking.
All that shows that PD is thinking the way ahead of any of us - who are still looking for some features that other games have and GT still lacks - from basics such as changable car color after purchasing, to complex issues such as changable day/night cycle.
I think we all can safely presume that PD is 100% aware of all features that OTHER games have, but GT series track-record so far clearly shows us that their focus is different - they are trying to make breaktroguhs in NEW fields, in features that no other games have.
And maybe that is the reason why they are alwyas keeping their work low-profile, without communicating with the audience.
But I can tell that is exactly the main reason why I love GT series so much in favour to all other racing games.
I know, I tried to make that point earlier too...
