A few VR applications we overheard or came up with ourselves
3-D Print Preview
Don't waste your 3-D printer's time. Walk around your creation and get a sense of its actual size before committing real-world resources to making it a reality.
Get that old-timey drive-in vibe, and, with enough coding, maybe add a date to the experience. Any tactile feedback to your physical advances will have to be supplied by the user.
Turn pages by tilting your head to the left or right. Perfect for disabled or injured individuals. Or forgo the book altogether and have a virtual Morgan Freeman or Judi Dench read you to sleep.
What happens in virtual reality stays in virtual reality.
Actual Virtual Tours
Walk around a house before you buy it. Look over your office building's atrium before constructing it. Architects can give clients "walking" tours of spaces they've only imagined.