See it is all about what additional features the device can give you.

My n800 can do streaming internet shoutcast radio. Which is really a great boon. You have have 30 gigs but radio is totally different. The element of surprise and the anticipation for the next song is wonderful. And you listen to songs which you missed downloading also. And there are thousands of internet radio stations to keep you busy.

Then there is voip and im. It is a good way to keep in touch when you are using multiple clients.

Then there is gps which is cool to have and really useful when you are in the car.

I can pretty much watch any flash site. I am not restricted to mobile youtube. I can watch dailymotion and embedded youtube videos in webpages.

Then there is support for multiple video formats using mplayer. it sucks when you download a video file from the internet and you cant open it.

The fm transmitter is really nice. And then i can use A2dp and connect wirelessly and use my bluetooth headset.

All these you may say that you dont use them. But you will appreciate the use only after you use them. For example a2dp is pretty rare these days. But it is really very convenient to use. After using it for some days you will never like to go back to wired headphones. For that matter after 6 months when apple makes a2dp a default in its iphones just see people say how wonderful it is. But the same thing has been there 6 months back. And it is available now although a little spotty.

Another great thing with the tablets is the wonderful linux world. Thanks to the n800 i am learing about linux and now understand how crappy windows is.