Full-size tablets with 10-inch or larger screens, as well as hefty hybrids such as the Lenovo IdeaPad Yoga 13, get heavy after an hour or so of use, particularly if you're cradling the device while standing or walking. Even the svelte 4th-generation iPad weighs 1.46 pounds including cellular.
Anything lighter out there? Yes! The Sony Xperia Tablet Z, a 10.1-inch Android slate, is a comparative featherweight at 1.09 pounds. If you're wondering how Sony's designers trimmed the fat, check out this interview. Also, Apple reportedly is working on a slimmer full-size iPad, one that incorporates the thin-frame design of the iPad Mini while retaining a 9.7-inch screen.