Oh look at that, I could have bought 2 Xbox's and Kinect for that bullstuff.
If you bought the latest Xbox consoles as they came out...
1) Xbox. $300 launch price. Not counting controllers or anything that you'll probably want.
2) Xbox 360. $300 launch price for the
bare bones version. Not counting controllers or anything that you'll probably want.
3) Kinect. $150.
So you've already spent far more than I have. Your original figure is also forgeted up because 2 Xboxs would cost more than my figure even without the kinect. Dumbass, learn how to do simple math.
And that's not even counting (this is about when the figures break down from 'actual fact' into 'estimates')
4) replacement Xbox(s) because the original(/last) one broke.
5) controllers and all that stuff
And the lack of all the things you can do on a PC that you can't on an Xbox.
Overall, the price comparison just doesn't really work. With some work you can get a good computer for around $1000 and pop $500 on upgrades over the years. Keeping up with consoles over that period will get you up around $1000. The abundance of extra things you can do with a computer well makes up the quaint $500 difference.
And if you're someone like Bisjac none of this really matters at all.