re: 8 Things Tablets Still Can't Do
Yes, I agree that it isn't nearly as nice typing on a tablet screen as it is on a physical keyboard (as you noted, one can be used, and I do take a BT keyboard with me if I envision any serious typing in my workflow). That said, the iPad isn't THAT bad (15 words), as I often type much more than that in answering an e-mail or responding to a blog post, etc.
I can type about 30 wpm consistently on the iPad, which isn't that horrible (my speed on a physical keyboard is consistently 50-ish), well at least when copying stuff for a speed test... I think I'm considerably faster on either when just typing my thoughts. But I do find the task more tiring on the iPad and more frustrating.
But, the plus side is that I can pull out a tablet and be in a program, entering data or using the UI much more quickly than I could get out a laptop, open it, wait for it to be ready, find a place to set it or try to hold it for typing, etc. In those moments (which actually happen quite often when I'm mobile), the speed of entry usually isn't as key as the speed of being ready to use it.
If I'm in a meeting or lecture, etc. where I know I'll be taking notes, or doing research/writing type work, I just use the external keyboard. With the external keyboard added, its only slightly slower to work than with a laptop w/ trackpad (a trackpad, IMO, is still superior for text selection and positioning, etc. but not by nearly as much as a mouse on a desktop box.).