Lenovo's been making portable "tabletop" all-in-ones for some time now, but although they run off a battery, it'd be disingenuous to call them "portable": The original 27-inch Horizon PC weighed 17 pounds! Not exactly ideal as a family PC -- not unless little Jimmy has a strict weight lifting regimen, anyway. With that in mind, the company just unveiled two additional models, both of them smaller, lighter and relatively easier to carry around. The more compact of the two is the 19.5-inch Horizon 2s, which weighs just 5.6 pounds -- about the same as some 15-inch laptops. Meanwhile, there's the bigger, more affordable Horizon 2e, which has a 21.5-inch screen and comes in at 10.1 pounds.