First impressions are very encouraging. While it doesn't beat Rift display's, it is vastly better at tracking. Also many games confirmed for SteamOS (Witcher 3, Batman Arkham Knight), there is a sale going on atm. Source 2 announced, will be free to use (not sure about source code availability). Also some Steam Machines revealed but not pricing (Zotac Steam Machines is fucking great, but I doubt it will be sold for less than 1000 dollars). Final controller design shown. Steam Link (50 dollar streaming machine) shown. Also nVidia Titan X revealed on GDC.
In other news, Unreal Engine dropped subscription. Source code and everything else is free to download, you only pay 5% royalty for products that earn more than 3000 dollars. Unity answered with free personal edition (no royalty) but dunno about source code. Shown nice demo, just like Unreal. Also UT has first map finished, looks gorgeous. Vulkan API announced (codename OpenGL next), a lot of code is taken from AMD Mantle API. Mantle is dead. Source 2 will support Vulkan, Epic didn't say anything about UE4 but it is matter of time imho. Vulkan supports all platforms, even mobile.
Leshma from GDC 2015, out!