The consoles use AMD APUs. Why dont they say that? Its like they are trying to hide the fact that the consoles use budget pc kit. Its never fair to compare a PC to a console.
Your comparing two totally different things. PCs are always going to have superior abilities when it comes to power, backwards compatibility, versatility, servers, and expandability. Consoles are way more convenient and they also have a bigger user base which means in most cases they will get games first and in some cases exclusively.
Consoles are geared towards a completely different type of consumer. Not inferior in any way, just different with a different set of needs and wants than their PC brethren. (and that's what we are, maybe sometimes we hate each other but we are all spewed from the same loins.)
With that said...If you are a console gamer and something in the PC world stay away from alienware. They are overpriced. If you are capable just build your own. Its cheaper and you never have to make any compromises.