I bought an Xbox 360 about six months ago to serve as a Windows Media Center extender - while I was at it I picked up GTA5, too. It's still a very respectable machine, given that it cost me less than $100.
This is why the XBOX 360 has had fairly long legs.
It's no longer "just a game console" and is really in the first generation of converged, internet-updatable consoles.
And in that generation? Even if your console doesn't run the latest games, there's still substantial value delivered for a lot of people through Netflix, social features, casual games, etc. And MS can continue backporting their UI updates.
