And your quasi-answers are.....
Yes, it seems like good value for money. Actually, very good value for money. Without looking up all the component costs, it almost seems to be below cost-price....I'm suspicious
Yes, but I don't play Skyrim so can't really check. other than looking at requirement charts.
I'm assuming you're asking 'how long' will the configuration last....my crystal ball is a little cloudy on this one, but since Windows 8 isn't updating directx, you should have at least 4 years before any games are released that would provide substantially better graphics, requiring new hardware and operating system.