Goodbye Clicker?

I'm watching Seinfeld right now. Jerry and Elaine just had a fight over the TV "clicker." All of which made me think, "When will the 'clicker' be extinct?" I'm surprised the "clicker" is still around. You'd think we'd eventually transition to no "clicker" at all. Perhaps changing the channel with our voice? I'm sure it exists now, but not mainstream. Maybe in a few years?