As reported by Engadget:
Vista Capable sticker lawsuit gets class-action status
It looks like that little lawsuit over "Vista Capable" stickers on PCs could now be about to get quite a bit bigger, as a federal judge has now bestowed class-action status on the suit, which accuses Microsoft of misleading marketing. More specifically, as the AP reports, the suit alleges that the "Vista Capable" stickers slapped on PCs during the 2006 holiday season created an "artificial demand" for the computers, and "inflated prices for computers that couldn't be upgraded to the full-featured version of Vista." As we've seen, those stickers even took in at least one higher-up at Microsoft itself, who has made his thoughts on the program quite well known. While things are still obviously in the early stages, the law firm that filed the suit is now looking for others that feel they've been burned by the stickers.
My experience is - even the computers that have Windows Vista preloaded are "incapable" of running it. I don't know a SINGLE Windows user that has NOT downgraded back to XP!
I had feared that Apple would be subject to a lawsuit like this some time ago with the transition (and death) from the OS 9 Classic environment. Many software boxes (still in stores as budget titles) say, "OS 9 or higher" as a requirement - when in fact; they won't work at all with Intel Macs or Leopard.