few of those look like in-game shots so much and high poly scenes. Devs will take a gazillion polygon model and use it to make a lower poly model + <insert (x)map here>. The curves on the nanosuit are far too perfect to be worthy of todays hardware which indicates to me that these are not game shots.
Sorry to burst the bubble
I said 4 years, but its very hard to gauge. It also depends on someone porting a game like this to linux.