Many of us have looked extensively at pads long before this, and concluded that they are not ideal. They may have other support uses.
But I'll admit that speech-to-text has good potential for information recording, as long as it is reasonably accurate and provides an easy way to correct errors & omissions.
The iPad was a revolution in exactly the same way the iPod was a revolution. It had a more accessible UI and made trade-offs to be a bit slicker than what was out there, but they were the right trade-offs which were needed to take it to mass appeal. It's a good product, and it will revolutionize tablet use, but not because it's a massive technical improvement.
I have before me a ~1 kg laptop with an actual keyboard on which I can type notes almost as fast as I can speak, hold in one hand as I see a patient, with speech recognition already installed, local secure printing, sensitive data that lives in my office and not on your remote server farms, a hard drive that I own, can copy and share as needed, and can keep as secure as I like, and applications which do not require constant secured access to server(s) whose reliability and security I have no control over.
I love the iPad for a bunch of stuff. I own two. I'm an early adopter of all kinds of this type technology. I love toys.
But I'm not getting the "revolution" part of this beyond, forgive me, somewhat breathless and vague marketing hype. Tablets have been around a while and not caught on with physicians for a whole variety of reasons that you folks seem oddly unaware of.
Sincerely good luck with this, but you're not solving any problems for me or any physicians I've talked to about it.