Gamer and Surrogates could be straight tech. Surrogates would be using 'borgs that Riggers could ride; while Gamer means giving the 'avatar' Move-by-wire and other 'ware, plus a kind of rigger control rig that overides the avatar's control of his body.
I haven't seen Inception yet, but from all I've heard, it may be more magic than tech for a SR game.