I got one thinking it's going to be 80% toy & 20% work, but turned out to be 80% for work & 20% toy.
I do quite a bit of meetings both off-site & internal & find it better for minutes that can be mailed out on the fly.
Camera sucks but if you want to capture an a brain storming idea of the white board to referance later it works ok.
Depends what you plan to use it for can become indespensible.
Just checking parenting ratings on IMDB before we watch a movie with my kids makes for a handy tool. It's "always on" ability will make you despise your laptop.
I also recommend get apps that fit your requirment & it must be connet to the net. For me apps like Dropbox has made my life easier.
No I don't "need" it, but it does simplify my life.