They mentioned the difference between Windows RT and Windows 8. And the only difference is that Windows RT does not run legacy apps. Something we knew six months ago. Otherwise, it will run pretty much all W8 metro apps just the same. They also mentioned that Windows RT (like Windows 8) will be able to accept pretty much all USB peripherals already on the market.
Seriously, if people want to run legacy apps, they know what to get. It doesn't necessarily have to be a Surface. They showed some freaking amazing X86 tablets and some amazing hardware in all types of sizes. I personally liked the Lenovo (I think it was that) tablet, small (looked like an iPad Mini), and it's a full blown X86 tablet! Really some cool form factors.







