@SZapper - I don't think it's necessary for all tablet to come with handwriting software. If they start adding more software, I think it would drive the price up.
Plus, there are several different kinds of handwriting recognition software out there. I think that a lot of people would like to pick one for themselves.
Because let me tell you, they're not all created equal! I used one on a friend's tablet once, and I could barely get it to write. But it worked for my friend.
If I was going to get something like this I'd definitely try it out before I purchased!