PlayStation boss Shuhei Yoshida told us back in October that Gran Turismo PSP still exists, despite the fact there's been little info since it was first announced years ago.
Yamauchi has previously said work on the portable game will begin proper after Gran Turismo 5 launches, which is expected to be late next year.
As far as work on that game goes, Yamauchi thinks his team has reached the "target level" of detail on the vehicles. In the future, they will work on bringing the environments and the people in them up to the same level. Plus, of course, there's the online mode to be tackled.
"We've only done a very small part of what we want to do online. And, of course, there are a lot of things you can do online that we haven't even touched yet," said Yamauchi.
"We're really on the starting line for online futures. We're going to need a lot of software improvements, hardware improvements, and then infrastructure improvements all around the world."
When Yamauchi thinks to the future of online, he plans content for internet connections "ten-thousand-times faster", apparently.
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