kesis85 :
lol what? 2x 4k = 8 x fhd = 8k
8K is equivalent to four 4K screens, or sixteen 1080p screens. Not only double the width of 4K, but also double the height.
dark_lord69 :
They can make 4K VR but we don't have affordable hardware to run it. We need faster video cards for HIGH resolution VR.
Well, they did mention plans to offer an eye tracking accessory here. Eye tracking should offer the possibility of making use of foveated rendering, which renders what the viewer is looking at in full resolution and quality levels, but anything in the periphery, where your eyes don't see details as well, can be rendered at a much lower quality, and the two images can be softly combined together. This can enable sharper resolution without greatly increasing performance demands. Of course, this headset still has over six times the pixels of a current-generation Rift or Vive, and even at 60Hz, you're looking at filling over four times the pixels per second. Foveated rendering could potentially help a lot, but you'd still likely be looking at needing around double the GPU performance of those current headsets.
It's also possible that Foveated rendering might need to be support natively by games for best results, and as far as I know, no current games support it due to the lack of eye tracking hardware in today's VR headsets. It's possible that some universal method could be implemented in graphics card drivers, but I doubt AMD or Nvidia would implement something like that until the major players release headsets with such hardware.