Virtual reality faces numerous challenges, but one of the biggest is having to take your headset off whenever you need to run a conventional app. What if you want to maintain that immersion, or just want to use a VR device as your only display? That's where BigScreen thinks it can help. It's developing software that places your entire Windows desktop in a VR environment. It's partly for the sake of immersion (you can have a massive, wall-filling screen without spending a fortune), but it's a bigger deal for social experiences. You can see a friend's shared screen as a separate virtual monitor, or play games and movies with friends who sit in using personalized avatars.