Today canonical reviled ubuntu for tablets , it will support many screen sizes 6″-20″ as canonical wanted to cover all screen sizes from desktop to smartphone and tables , ubuntu for tablets OS will work and run on very much same as Ubuntu for phone .
Multitasking
Ubuntu for phones multitasking in amazing way using “Side Stag ” which looks like windows 8 side by side ( snap) so you can run apps which support phone size screen while running some other application in remaining space
Availability
As expected ubuntu for tablet OS will be available for download from 21 Feb , and can be installed on nexus