Regardless of any new features released before the end of March or not, I'm still going to be getting either the 32GB or 64GB non-3G version.
Ever since the announcement, when I get home from work I think about what I do when I get my MBP out. Do a little web surfing, check personal email, listen to some music, read the news. Then I'll put the MBP away, catch up on some TV shows that I have already purchased on iTunes on my

TV, then open up the latest book / magazine before making dinner.
The fact that I will be able to do all of that with one device is just a huge plus. Yes, I will still be able to use my MBP for all of my photo editing / video encoding. I don't lose any of that ability by getting the iPad. I just gain a much simpler experience at home every night of the week.