Now, i'll explain what i always wanted GT to evolve into.
I've been fascinated ever since i played my first MMORPG by the idea of a persistent online GT world of player, grinding from the humble kei car races up to the LM cars, selling each other parts(we want tuning back!), services (setups, personalized liveries, imagine giving your car to another player and wait for him to be done with the requested paintjob...), taking part to auctions etc, all supported by a clever economy system...kinda like a second life, but less stupid and 100% revolving around motorsport^^. I would love to get my twin turbo 1988Supra to the flea market to shop for parts, striking a deal on that muffler i was looking for and maybe sell those Nissan March parts i was keeping in the trunk, just in case i could find a buyer...
Hell, i would even use the typical NORTH SOUTH WEST EAST CITY map from good 'ol GT2 ^^
i know some ideas are very naive(online game's economies are very easily exploitable for real life profit and it would be a mess to mantain the server infrastructures of such title) and this is basically the wet dream of every gamer for any genre of videogame, but it would be pretty amazing to turn that solo grind (wich would be still cool and viable) into an online experience where my cr*p is somebody else's fortune and vice versa.