Lenovo's M90z all-in-one touchscreen PC is designed primarily for business users. The multitouch touchscreen uses optical technology and it had excellent accuracy during our tests -- you can even use it while wearing gloves. However, the overall configuration of the PC is a bit of a letdown considering its (Australian) price.
PCW: All-in-One PCs are self-contained: all the components are mounted behind a display, with screen sizes ranging between 18- and 27-inches. With no cords to manage or peripherals to juggle, setting up your new all-in-one PC can be as simple as pulling the machine out of the box and plugging it in, and they can generally be placed wherever you've got a spare power outlet.