Comment 5 for bug 796857

At least for Ubuntu in Nexus7 there is the four-finger-swipe multitouch gesture which shows and hides the unity panel (see here https://wiki.ubuntu.com/Multitouch).
Unfortunately there is no Settings panel for this on Nexus7 and of course one could argue that multitouch gestures still need some tweaking on Nexus7 but the above mentioned gesture works!