It's really crappy how Microsoft deactivates all previous versions of Windows when a new version comes out. Might as well throw out my Win7 Isos now. :
You wish Microsoft would support one version of Windows for an extended time Six? 13 years of support for XP isn't good enough? Vista and 7 can probably expect similar treatment.
8 appears to be an incremental update aimed at media and mobile PC users. MS probably aims to run 7 and 8 alongside one another, only pushing an upgrade when the next major platform update comes along...