From something I did with my tablet, plus this quote from the other iPad thread, I'd like to propose what magic looks like:

First, what I did with my tablet:
http://talk.maemo.org/showthread.php?t=27279

Second, the quote:
Third, the magic:

The hardware needs to be the size and weight of the regular Kindle. No keyboard as the OS's input layer is totally finger optimized. However, there is a stylus because you'll need it for...

The main software would simply be a Firefox/MicroB-like web browser Xournal with some extensions for shapes, creating vector graphics, and sharing notes via PDF directly to devices (ad hoc networking).

*Missed one thing: needs Office file editor, not viewer.

The targeted use is to office workers who need to annotate, browse files on hosted shares/servers within an enterprise, and have a sufficient notification system for email, IM, and VoIP (w/wireless headset).

For what I'm speaking about, color or not, this device comes in under $400 USD. The user interface is built around the browser and Xournal, making the rest of the user experience derivative of the lessons from both those applications.

If Linux wants magic, it needs to package the wonderful energy of its contributors into something like this. Otherwise, it will always be a niche population, seeing the polish of others, and never pulling together what it means to be a cohesive solution, rather than an agreement of many parts.