You're Not Reading the Post Carefully
It's not "old" hardware if Microsoft says that the new software will run on the hardware. The issue there is that Microsoft doesn't tell you "how well" the software will run. Only that it will run. A lot of people here have said that Windows 8 will "breathe new life" into old hardware. So, if you don't take what you read here or from Microsoft with a grain of salt, you could wind up in the situation described. Has nothing to do with the hardware; it only has to do with the hype.