It all depends on what/who I get to command. I try to command my cats, but they just look at me with their "Oh, come on, Mom -- you know who is really in charge here, and it's not you!" expressions.
If I could command it to fire phasers at my neighbors, that'd be nice. And photon torpedoes at anybody else who comes around uninvited.
Of course, if I could command the chair itself to do something useful, like the vacuuming or the dishes, that would be even better.
Otherwise, I can't see spending all that money.