Lenovo IdeaCentre A720
Coming in at No. 30 on our Top 100 list, the A720 squeezes into a base the size of a small pizza box. That allowed Lenovo to flatten its 27-inch, 10-point multitouch display to less than one inch thick. Lay the articulated display completely flat, and you can use the computer as if it were an oversized, stationary tablet.