I'm kinda dissapointed with the tech demo, I honestly can't even do anything with it, great video though.
AMD FX 8320 GTX 760 It will probably lag in the alpha where 2 or 3 cars are crashing I get 80 fps maxed out and goes down to 50 when Im crashing.
That's why there is an alpha. Tech demo is just if you want to see how well it runs, etc. If you want more cars+ maps buy the alpha. Known bug with the skidmarks. It will be fixed in due time. Just restart the game to fix it.