I'm glad that ARM tablets are finally getting a decent operating system.<p>Android is a pain for productivity - only one visible window, applications are killed in the background when you want them to persist, switching windows is tedious if you have many applications open at the same time, various deficiencies in third party applications like waking the screen and draining your battery, a Google account is required to do basic things like download apps, it's not possible to download APK's from the market in case you want to perform offline installations, plugging in an external hard disk results in a crash and reboot too often, media sound volume is reduced whenever an email notification comes in. That last bug has been around for three years - <a href="http://code.google.com/p/android/issues/detail?id=5012" rel="nofollow">http://code.google.com/p/android/issues/detail?id=5012</a> - and this is a piece of commercial software, not someone's hobby OSS project!<p>Not to mention that it's based on GNU/Linux [EDIT: NOT GNU, just Linux] yet misses important features like a good package manager, X11 and alternative window managers. Things like Debian Kit For Android address some of these issues but it still feels like a compromise.<p>I understand that it was originally designed as a smartphone OS but it just doesn't scale well to tablets.<p>Another alternative which is looking extremely promising, even moreso than Ubuntu, in my opinion, is Plasma Active - <a href="http://plasma-active.org/" rel="nofollow">http://plasma-active.org/</a>