Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Why wouldn't you bother with Windows 8? I know plenty of people don't like it because of the differences and such, but I've been getting used to it a bit and it's fairly nice IMO. Plus it's 'lighter' and will load quicker.
Because there's no performance improvement, yet it has issues with several games/programs and generally worse (immature) stability. So as you aren't likely gaining anything (the "new" stuff is meh too, it's mostly touchscreen junk) it's not really worth the cost or effort for nothing.
The faster startup is from basically saving an image of the OS and loading that instead of doing it properly, and it takes up slightly more HDD space than 7.