I upgraded my Surface to Windows 8.1 RT today. the update went through without any issues, although the download took a while. it’s a welcome refresher. I particularly like the fact that apps now have their own search bar embedded inside the app itself. Searching no longer requires going to the charms bar.
My year-old Surface also feels a bit more peppy after the update. its a lot more pleasant to use it. Standard Microsoft apps received a subtle facelift as well. I especially like an updated Store app. It’s a lot more fancy. the on-screen keyboard is more user-friendly as well.
There is a start button, but its functionality is of dubious value, it switches to Metro.
Overall it’s a welcome upgrade, I like it, but it’s not revolutionary. If you have Windows 8, I recommend upgrading.