I got out of hardcore gaming, and quite enjoyed the idea of booting up a game in a few seconds on my laptop, playing it for an hour and forgetting about it.
It worked very well for things like Borderlands and a few indie titles (Madballs, The Ball).
I also owned the physical console, so the transition of "I want to play Borderlands for an hour on my laptop immediately after finishing this work thing" to "My day is over, let me pick up that same game on the TV" was pleasant.
As far sluggish controls, on a connection that exceeded 10Mbps, the experience was only slightly worse than a wireless controller on a console, and after a few days of it being the only time I picked up a game I adjusted quite well.
I've since accepted that the service was aimed squarely at the market that my situation happened to exactly occupy (high bandwidth, casual gaming, multiple physical devices, just the right titles..), so your mileage may very well vary.
I'm curious what a native port of Emacs on an iPad actually contributes over an Screen/SSH session on a "real" machine with "real" compilers and tool-chains.
