In "keyboard" mode, you need something to tap on, but it can be the mousepad on your desk, your opposite arm, the underside of your dining room table, the side of your thigh while walking, the handlebars of your bike, etc.

There are also "air gestures" (Smart TV control, air mouse, and media control modes) that don't require a surface. (By the way, there are recent updates in this department that leave out the Tap Strap).

I'm not into gaming, VR sets or the like at all, so I can't say how good or bad these are for that sort of thing, but that market seems to be the main focus and direction the company is taking these days.