As anyone who has used any kind of VR technology will tell you, motion sickness is most definitely an issue. It's an issue that's improving rapidly, but sustained play does often result in mild nausea. Sublevel Zero, a VR-enabled game set for release in 2015 seems to forget that fact. Imagine playing Descent on the Oculus Rift/HTC Re Vive? Yeah, it's like that.
And just thinking about playing Descent using VR is making my stomach feel weird.
But counter-argument: Sublevel Zero looks super cool, and it seems to have that 'I'm seated in a machine' feeling that works so well on the Rift. It also has some pretty swell pixel art. It's been a while since we've had a weird, confusing, twisting first-person video game ruining everyone's sense of perception. So I'm on board.