Yep, well I was travelling through Asia a few weeks ago, happened to be in Singapore. Checked into my hotel, plugged in the laptop and about half an hour into checking my email the hard disk crashed. Lucky for me my company enforces mandatory backups done online so wasn't too worried about data loss.
However, having no laptop while on business travel is a real downer. Lucky for me I also had my TP. So rather than being an option, I was literally forced to completely rely on my TP for everything I would normally rely on my laptop to do. And you know what? It was brilliant. Okay, so its not a full replacement for a laptop, but it gave me about 90% of the basic business functionality I needed via email, web browsing and viewing office files like PowerPoint and Word.
The real revelation was, about two days after I had my laptop back in operation (my company has Exec support all over the place, even Singapore) for the remainder of my 2 week business trip I hardly used my laptop and instead continued to use my TP.
Why? It was lighter to cart around, it lasted all day, and gave me super quick access to what I needed when I needed it. When it wasn't being used for business, I was using it to catch up on news, while on my flights it was my personal entertainment device eg watching movies, playing games, listening to music and writing documents. Alas the crappy Kindle update meant I could not use it for reading books as the app kept giving me that stupid and frustrating whitescreen. Not the TP's fault per se, but nonetheless rendered useless because of it.
I'm convinced that in one shape or form, tablets will erode the value of laptops for the average user. Don't get me wrong, in its current state the TP can't do much of what I need to do (well) but its clear that the writing is on the wall. Lots of organisations are starting to see the practicality of these devices and frankly I'm already convinced. These are more than just light duty entertainment devices, these are becoming serious contenders for the mobile business professional.
Just my 2 cents -- peace ;-)