From Half Life to Iron Man: Is VR finally delivering?

Players test the PlayStation's VR headsets that can be used with the PlayStation 4. Will VR finally become the next big thing in gaming? — Henning Kaiser/dpa

Virtual reality was supposed to be the next big thing. However, due to the high financial hurdle, it hasn't taken off as predicted. Now, game developers are trying to develop the big "killer app" for VR.

When game developer Valve launches a new game in the Half Life series, it's all about one thing: technical innovation.