Parallels Access lets you connect with both Windows and Mac computers from your iPad, and even gives you an iPad-like experience for launching and using regular desktop computer apps.
When I met with the folks from Parallels, they described the launcher interface using the word "Applified," as in, the programs on your desktop computer are "applified" to work well with the touch screen of your iPad. What that means is, Parallels Access detects the programs on your computer's hard drive and gives you app icons in its own special launcher for your desktop apps, laid out just like other apps on your iPad.
It's important to note that Parallels Access is a subscription-based service that costs $79.99 per year, which you will pay for in the App Store. But the problem is that it's $79.99 for each computer you access, so if I were a paying customer, the ability to access both my Mac laptop and my Windows desktop for this review would cost $159.98 per year. On the other hand, it may be worth the money if you spend a lot of time away from your desktop and need to show something to a client or edit documents on programs that are only available for desktop. Still, it seems like the pricing is a bit steep for access to each additional computer.
To get started, go to the App Store and download the Parallels Access app for iPad for free. Then click on the link to go to the Parallels Web site where you can download the Parallels Access agent for your Mac or PC. You get a 14-day free trial of the Mac version, and the Windows version will be a free public beta at launch (later going out of beta and becoming a 14-day free trial). During the trial you can purchase a one-year subscription through the app to continue using Parallels Access. Once registered and signed in, you can simply launch the app on your iPad, then choose which connected desktop you want to work with. I tried it with both Mac and Windows systems and it worked smoothly on both.