I have tried Windows 8 on both my old Acer 1825ptz convertible tablet and also my desktop. They both worked fine. I don't find them inefficient and that would be the last word I'd use to describe Windows 8. It's surprisingly working extremely fast for an old device with an old tablet's 320GB non-SSD SATA drive. It managed to boot up in seconds.

Application wise, typical Windows installation method is available. Else there's Market Place where apps can be installed like iOS or Android which I think most people will find it familiar. On my desktop I still managed to play my games like Starcraft 2, Crysis, Sleeping Dogs, etc. So I didn't find any problems on Windows 8 that I need Ubuntu to fix.

So far, I only have 1 trouble which I don find it troubling. I can't seem to find any antivirus that can run on Windows 8 yet. So I gotta stick to Windows Defender for some time.