Most modern laptops are capable of running games including DBC14, Steam also offer their in-home streaming, which I haven't tried but again you can stream it to any WIFI connected PC and play it on your TV with the same amount of cables it takes to plug an XBOX in. The whole idea of you can only play games on PC's in dark rooms is kinda, not the modern world. Since consoles are moving towards being entertainment devices and the gaming thing is an add-on, I imagine in a few years (maybe a decade) someone like Apple will come along and blow the whole thing up and incorporate their AppleTV/Home Computer that plugs into your TV as an entertainment device and plays games you download through iTunes and can stream to your other devices and so on...
It's really only a matter of time before the idea of "Discs" are gone for gaming, once that happens I think a giant console box becomes irrelevant as internet speeds and prices become more competitive and the line between internet, computers and televisions disappears. Some kinda revolution is due, I think it'll happen sooner than later as long as access to cloud-based storage and internet speeds increase.
...that all being said, I love the ol' PS3 because it's easy. It's just plug and play. PC's take a bit of know-how and fiddling around, I guess the most likely always will. Although, Steam does make it easier, certainly.