Well, yes. When you can't update applications because your OS is too old, and you can't update the OS because the hardware is too old, you need a new computer. And I even got a new monitor. There's a chance I could run the old monitor, too. That would give me incredible screen real estate. In the scary realm, because my new monitor is 27". Plus the old flat panel? Yikes!
For now, I'm just installing applications that I want to have and I'm loading data. I finally have terrabytes of drive space on a single machine, with NO external hard drives. All of my music and all of my pictures in one location! Sort of. Eventually. Not counting local and remote backup copies. I AM a geek at heart. I have never lost data yet. Drives, yes. Data, no.
Folks are saying that they hate Windows 8. I dunno yet. There are a few things I'd rather it didn't do, but I can always change settings. A lot of things people are complaining about being hidden aren't in any different location than they always were. In some ways, I'm finding Windows 8 to be a cleaner interface.