The tablet has become narrower, but longer on the y axis, compared to its predecessor. On the back, the Nexus logo has turned larger and vertical. A rear camera (allegedly, a 5-megapixel one) has appeared. On the front, a notification LED light surfaces. There are changes under the hood with Google and Asus now going for a Qualcomm chip instead of the Tegra used in the first-gen Nexus 7.
Good news is that all those rumors will be coming to an end on Wednesday, July 24th when Google is expected to officially unveil the second Nexus 7. Stay tuned for our coverage of the event.