I don't care about how detailed the cars are, this is a game, not a museum. Give me my 60FPS or at the very least, some kind of 720p 60FPS option.
Because muddy visuals when 720p gets upscaled to 1080p has no impact on gameplay, right?
Framerate is a no win situation for Evolution. This is at it's core a launch title engine for new hardware. People expect it to 1. run at full HD native (1080p), 2. look like a significant generational leap in visuals and 3. run at a full 60 fps locked, all the time, every second of every race.
You can't have all three for what is basically launch code at it's core, or even year one code. We could have 1080p/60fps and get a game like Forza 5 that is basically Forza 4 HD, or we can have a real next generation racer that has to sacrifice something. Both resolution and frame rate impact game play, but resolution also impacts visuals so if you're picking one or the other the smart choice is resolution.
That decision is only compounded further by just the level of technical cuts they'd have to make to get 60 fps locked, and if it isn't locked all those game play advantages disappear as dropping frames is far more intrusive to good controls than just a lower refresh rate. Even for racers any sane person should want 30 fps locked over 45-60 fps variable.
So either they could have released this game with zero intention of it being a success as it would look like a prettied up last generation game, or they could rely on it's style being a legitimate homage to PGR which played just fine at 30 fps with PGR4, and having killer visuals that help to move next generation software and hardware. I think it's pretty obvious what anyone who wants to keep making video games for a living will choose.
A lot of racing fans need to get a dose of reality on the 60 fps whine-fest. Not every game is Project Cars and not everyone is going to buy the $800+ PC needed to run Project Cars at high resolution, high graphical detail, and a rock solid 60 fps. A middle ground needs to exist.