Control your PC from your iPad for 6.99
Splashtop Remote is an iPad app that helps you do that. This works for Windows laptops and desktops. NYTimes has a detailed report:
Splashtop Remote is an iPad app that pairs with a free Windows application to display your PC screen on your iPad, provided both are on the same wireless network. Splashtop is the name of a small quick-boot program that comes pre-installed on many PCs. You may know it as Lenovo Quick Start, Asus ExpressGate, or HP QuickWeb. Splashtop Remote is made by the same company, Device VM. The company, which employs hundreds of software engineers in the US, China and elsewhere to build, test and debug its wares, has a reputation for building small, fast, bug-free programs. Splashtop Remote is no exception.