Touch input is one feature that distinguishes the B320 from HP's Omni 220. I still don't find touch a crucial desktop feature, but you might if you intend to use one of these PCs as a home entertainment kiosk. The Lenovo uses surface acoustic wave touch (SAW) technology, the same as that in Samsung's Series 7 all-in-one. It requires you to press down a bit harder than with resistive or capacitive touch screens, but the accuracy is good once the screen registers your input.
Lenovo's touch software suite is a piecemeal assortment of programs. You get VeriTouch, which uses pattern drawing for system authentication, the App Space media player, and QuickNotes note-taking program, among others. They're all fine, but they exist mostly as accessory applications. You might use them on occasion, but for better or for worse, Lenovo has no full-fledged touch operating environment like HP's TouchSmart software.