For me the different ways of playing a game signify different experiences. When I want a solid RPG or nice 2D adventure game I curl up with my DS and enjoy. When I want to play multiplayer games, shooters, or 3D adventure games I lounge in front of the TV on my 360 or Wii, or sit in the cocoon-like area around my PC. On the go, I whip out my iPod Touch and play little puzzle games and such for 5-10 mins while waiting for the doctor or whatever. I don't see any of these going away and hope they do not, as they provide me with whatever experience I want at a given moment.