The iPad would fit well in "paperless office" businesses still trying to get rid of the meeting-print-out. Laptops are still too clunky to just read text from, but an iPad-type device would probably suit. I'm not sure it would fit well into Microsoft software offices though...
I think I'd also still prefer eBook screens that look more like paper. LCD just won't cut it for reading text. I hate reading from a screen, more and more every day.
Most complaints about the iPad have been that it is more suited to consuming content than creating content. That is exactly the point I believe (see above paragraph). It is a consuming device, for watching, reading, listening. It's not for typing, coding, taking photos. Whether that is commercially successful or not we'll have to see.
One side rumour to the iPad is that Apple wants to use it as a platform to push the price of TV shows on iTunes down to US$1. While that would still probably mean $2 in Australia, it's a much better price point for single shows.
I've always thought iTunes selling TV best suits those that want to grab that show they missed on TV, rather than an alternative to watching on TV or buying the DVD. It works best as a tax on your mistakes (taping didn't work) or impatience.
Why spend the same amount of money on a DRM'd digital version when you can buy the DVD? Because it is available earlier, and because you can buy a single show. Sound familiar?
Unfortunately iTunes video is unplayable on anything worth talking about. Also, typically iTunes won't sell it if it hasn't been broadcast. Globalisation my ass.
Nice thoughts for the future though...