I got a hold of this last night...
As a previous owner of MotoGP 1, 2 and 3 I can say this game does those justice...
the graphics overall are a big improvement over the previous titles. they may not stack up against other currently available 360 titles but they are a clear improvement over the Xbox 1 counterparts.
The bike and rider graphics are fantastic. The scenery graphics, particularly the textures still have a lot to be desired. I also found the animation to be HORRID. watching the replay and playing close attention to the bike's and the rider's movements, when they lean, shift their position, crash etc... all of it seems very blocky and unnatural. if you lean at just the right angle the guys arm will wig out and "twitch" at an in human speed between tucked in and stuck out.
I thought the graphics on the Xbox 1 titles were pretty impressive for their time, and this IS an improvement in terms of the bike and rider... but as I said the Animation need A LOT of work as do the track textures. I'd even go as far as to say the animations are WORSE then the older titles.
Normally I wouldn't rag on the graphics for an unreleased title this much but the game is due out this month, we should be seeing something better then this. I really truly hope this is a demo that's been sitting on a shelf somewhere for months, because if this is a near complete build it's pretty sad. Especially considering this is turning out to be a seasonal game, the gameplay is exactly the same as previous titles, so unless they're adding some whiz-bang new XBL features (MGP3 was pretty feature filled, they'd be hard pressed to top it) or a whole bunch of new tracks... all we're getting is a roster update and a graphics update... with that into consideration and the fact that this is an exclusive title we should be some of the best 360 graphics to date here... They're not the worst graphics I've seen on this console, but they're no where near the best either.