I would like to mention that DE spins are very important with regard to the ARM7 arch. Gnome shell may or might not be working in arm so kde and the other DE spins are really important. Mostly kde from a QA perspective. As a primary architecture I feel this deserve extra considering. Arm QA is based on the KDE spin right now. Hopefully gnome will work soon, it all depends on 3d gpu support, so... depending on software rendering or open-source gpu rendering... kde is a must-have. The implication is because gnome require 3d that a software rendering situation should be happy for all  primary architecture. 

Thanks
-Jon