I don't know, you can download a number of SSH apps from the app store and use one to connect to a real computer. If one thinks of the iPad as a really smart touch-based, graphical input/output device that has limited resources of its own (like the iPhone), instead of as a one-piece PC with an onscreen keyboard, then that distinction opens up a whole new market that rides on the success of the iPhone, which has already seen more popularity and mainstream familiarity than OS X.
The iPad and its imitators all have potential, but not running Windows or OS X and their apps. Touch screen tech just isn't suited for apps designed for mouse input, because there's only touches: the device can't tell if a finger is hovering, like a mouse pointer with the button up because it only senses touches, analogous to clicking/dragging. Besides their tiny UI widgets, Win/OS X app interfaces are designed with mouse input assumed.
Yes, I know it's the same OS tech underpinning both the pad and the mac. And it would be nice to have Apple allow ad-hoc distribution without code signing, or at least allow app store alternatives that needn't adhere to the Apple-Disney smut scrub, aka App Store Approval Process. But it's their toy and they can lock it down if they want and we can not buy it if we
"There is nothing new under the sun, but there are lots of old things we don't know yet." -Ambrose Bierce