Most interfaces are doomed to irrelevance (if not failure) because they are more 'gee wiz' than practical. Touch screens (except for special apps like ATMs and kiosks) work best for simple menu selections, but often require you to hold your arm in an unnatural position. Gesture based systems may great demos, but are often too vague for realworld stuff. VR has potential in a number of areas where context and distraction is limited (would you rather work in a roomfull of people typing, or a roomful of people dictating to their computers?)

A good interface needs to be fast, unambiguous, not physically tiring, and simple.

[BTW am I the only person who HATES laptop touch pads? They slow me down enormously, and are very fatiguing. I can't imagine doing any serious work with one of those)