Just a few hours ago Canonical unveiled a new tablet running Ubuntu touch - the same OS running on Ubuntu phones. It will have multi user support and multitasking capabilities as well. Downloads for the Google Nexus 7 and Google Nexus 10 will become available along with Ubuntu Phone images on February 21st. Here is a screenshot of the new tablet and a couple of videos explaining its main features.
Do you plan on installing and using Ubuntu on your tablet or are you gonna stick with Android and iOS?