PS4 still has a FX8350 and a 7870 (effectively), that for $400 is a steal.
Hook it up to a monitor, sit in your chair and bam. Play some Killzone Shadow Falls (VIVA HOLLANDIA! DUTCH GAMES ROCK!!! <3 :lol(I play most games with a controller anyway, except MOBA's and RTS.
a terribly restricted OS, no upgrade capabilities and terrible controls. can't use it for anything but gaming and even gaming isn't much of a pleasant experience on a console.
that's pretty much like being happy to get a porsche for half of what you usually pay but then only being able to use it on a racetrack and not having the right to modify it at all. not of much use when you want to go to town.