Well, if you're going to be "creating documents" larger than casual emails, you probably want to be on your computer, with 16gb of RAM and 8x3ghz cores, two or three large monitors, and a terabyte of flash, ideally with your iWhatsit plugged into a docking station or just there on the network. You don't want to be using Mr Bill's lame excuse for a UI for serious work!
Of course, if you're out and about, then a lightweight pad or smart phone is handy and lighter in weight than a proper computing platform. Look up things on it. Take notes on it. Call or text on it. Then plug it into your real platform and get to work when you get home and comfortable.
VIDEO CALL on it:
My dad loves to call his relatives in England on it.
WEATHER:
Wundermap is his favorite weather application.
SPACE SITES:
Plenty of NASA updates available.
VIDEOS:
Yes, it is great for taking videos of stuff for quick use.
PHOTOS:
Got a nice camera on it. Great for showing the pics.