"slightly bigger than a Roku set-top box"What? Seriously, you must have never seen a Roku in person. That is easily 4x larger than a Roku. Otherwise it looks like it could be a strong competitor in the Steam Machine market just due to its compact size. Pricing and performance withstanding. But on the other hand "Dude your getting a Dell."
It will have as much or more air movement then a laptop and will most likely be housing laptop internals. Stop being an idiot fanboy.And Alienware stopped being overpriced in 2009 when Dell started building the laptops and not letting Alienware act like a separate division. Let me know where you can get a comparably powerful/spec'd machine for less.