Me, I'd go with one of those Japanese pillows over a projection, even if it they manage to make them truly 3-D holographic someday. Hasn't the technology been around, at least to fool you halfway through TV shows since the Seventies? It's not that companionship necessitates a tactile component (even Geordi had force fields to get it on), but there was an episode of the Six Million Dollar Man which scared the shit out of me and still would were I to wake up to it, where the bad guys tried to un-nerve Steve by making him see a static image of himself that was supposed to be his own ghost from having died momentarily on the operating table.