if the current rumors are anything to go by next gen both Microsoft and Sony will be using more efficient CPU/GPU combinations that generate far less heat than the current gen consoles generate, internal components overheating was the major cause of faults early on in both the 360 and ps3, with any luck both Microsoft and Sony will have learnt not to go ott with how much they put into their next gen consoles and have far better heat dissipation. if the next playstation is less powerful than the next xbox i dont think it will be a deciding factor in what console poeple decide to buy, it'll be all down to features and cost.
Current PC build:
Asus Z97I-Plus, i5 4790K @ 4.6ghz, EVGA GTX 980 ACX 2.0 1377/1853/124%, Corsair Vengence Pro 2400mhz 2x 8192mb, Corsair RM850, Corsair H80i, 120GB OCZ Vertex 3 SSD, 750GB Seagate Momentus XT SSHD, 320GB Weston Digital HDD, Corsair 230T, Corsair K50 Raptor, HP XQ500AA mouse, Windows 10 Pro 64bit. iiyama Pro Lite G2773HS 120Hz 1Ms G2G gaming monitor.
