A normal day's use with my iPad..
Wake up, make some breakfast and read the latest RSS headlines using Reeder. Check the weather with Weather HD before i leave the house
go to class, and use iPad to take notes, and read off of it in Public Speaking class. I use Simplenote for this
between classes browse a few websites using iCab.
I go to work. During my lunch at work I typically open iBooks or Kindle to read whatever book i am currently reading.
I get home, have dinner and while eating fire up Kindle or iBooks again.
Right when its time for bed, I prop up the iPad and I usually watch a few Podcasts or Ted Talk's to put me in the right sleeping state. I would always use the TED website, but now I use the Ted App. love the inspire me part!
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Other areas i use it on a not daily basis are: I make music, so I have synths, moogs, organs, mellotron app's that i plug into my MacBook Pro and record music with.
I use Simplenote and Pages to write school reports (although the longer ones i still use my Mac)
Flipboard is my offical magazine! I subscribe to a few select publications, and because of the nature of the app it really feels like a free magazine subscription!
I also use apps like usa today, facebook for friendly, official twitter app, comic zeal ect..
While all of these activities could be done on a computer, nothing has the battery life, the diversity, thin-ness, or the experience i would get from the iPad. I use my iPhone still quite a bit, and i use my Mac quite a bit to. But i would be lying to say that they have not taken a hit in my usage. Of course i mentioned a very computer-centric day for me, because many times i am doing social activities, but i wanted to say how i do use my iPad during everyday use. love it!
note: I typed this using my Mac.