Semi-Mobile Video
It looks like the iPad is a semi-mobile device in the "video streaming on the go" side of things:
The iPad’s built-in YouTube application strips both standard and HD videos to a dramatically lower resolution over the cellular data connection, something that iTunes Store video previews notably do not do, instead staying at a higher quality and consuming a greater amount of data. Other third-party applications, such as the ABC Player, refuse to work at all over the cellular connection, producing a notification pop-up that states, "Please connect to a Wi-Fi network to use this application. Cellular networks are not supported at this time."
So... if you had a Netbook and one of the 3G cards you can slap into a USB port, does this happen? I suspect not. Steve Jobs might want to hop on this, as it's clearly a bigger part of the experience than whether Flash supports touch well or not...
