It should come with no software or bloatware, this should be optional from an add remove software menu, it should be completely customisable, new file system, boot in under 15 seconds, not require anti virus, have multiple desktops and .....hold on that is what you can have now, Linux has always been ahead of Windows, all the features I like in Windows 7 Linux has done for years.
With Linux you don't ever need to re install to over come an issue, you can create your own OS and burn it to iso or usb thumb stick.
Don't get me wrong I love Windows 7 but looking at Linux you can tell what features you will be getting in Win8. I run Mint, Ubuntu, Windows 7 and will be using Google OS and I use Android on the move.