By 2020 W7 will be history.
Windows 8 will be launched sometime in mid-late 2012. By 2020 who knows what Windows version will be out.
W8 has some interesting features like Windows To Go.
The “Windows To Go” seems to be an exciting feature that basically allows Windows 8 to boot from a USB device (called as Live USB), including user’s programs, settings and files. The feature is designed to work with both USB 2.0 and USB 3.0, and on both legacy NIOS and UDFI firmware. However, Microsoft says that a user will not be able to “Hibernate” with this feature.
“Windows To Go is a new feature in Windows 8 that enables enterprise administrators to create USB drives containing complete, managed Windows images that users can use to boot and run Windows on any Windows 7 or Windows 8 capable computer. Windows To Go makes it possible for employees to use a managed device whether they work from home, a client office or in a free seating environment. This session will discuss Windows To Go, its hardware requirements and building compatible and complementary software.”
“Windows To Go” is a basically a feature stolen from Linux which has had this capability for a few years now.
It's a pretty neat feature....and of course all FREE for us using Linux...
Win8 preview and features