I decided to run some browser performance benchmarks from http://peacekeeper.futuremark.com/ in the Nexus 7 running Ubuntu, mainly to see how it compares with other platforms. Here are my basic conclusions as a result of the test:
- In general Ubuntu + Nexus 7 performs pretty well
- The Nexus 7 with Ubuntu and Chromium (629) performs better that the Android Nexus 7 (489)
- Firefox performance (257) is pretty bad compare with Chromium (629). I have tested it in my laptop and the same different exist, however the more powerful hardware makes it not as relevant.
Unfortunately, I wasn’t able to access the detailed results (it displays blank), any suggestions why? My results are the bottom firefox (257) results, and the top Chrome (629):
Victor Tuson Palau 
it would be great a dual boot installer for the Nexus 7 as you did with Chromebook, or even a USB stick installation for Ubuntu with dual boot.
And of course Unity style menu icons / ideograms for apps with finger friendly sizes at the other side of the screen, at least for Chromium and Libre Office