I have finally figured out how to exit the Full Screen mode on a tablet. Normally, one would need to hit Escape to exit into the reading or editing modes. Since there are no Esc key on the soft keyboard, it was always a challenge for me to exit out. Yesterday, I finally found something that works. A downward flick on the top of the screen yields the same results as the Escape key to exit the full screen mode.
Powerview remains my favorite Microsoft data visualization tool for a tablet; I am still eagerly awaiting on any hints as to when the HTML5 support will be available.