I'll never understood why Netflix, Hulu and others haven't done something similar to this. It's a much more natural way of "finding out" what you want to see. Create a bunch of channels based on existing tags or categories, have thing playing on a schedule, and allow me to zap through.

Bonus points if you allow me to zap as efficiently as I was able to back when we had analog TVs and cable. I was the master zapper, zapping through hundreds of channels in seconds. Just buffer the adjacent channels and calculate the maximum input latency.