Dismayed that family members are spread out over the house, each with a separate PC or tablet? Lenovo has something it believes will get them back together: a PC the size of a coffee table that works like a gigantic tablet and lets four people use it at once. Lenovo Group Ltd., one of the world's largest PC makers, is calling the IdeaCentre Horizon Table PC the first "interpersonal computer" — as opposed to a "personal computer."