If you are developing on a Tablet PC make sure you have the latest
tablets featuring Intel's sporty Pentium-M chip.

As for actually "using" a tablet, imho it is a pita. The Tablet PC is a
technology that has been glued onto windows with virtually no effort
being made to research how one would actually uses the tablet pc. The
handwriting recognition has made no progress and is completely
worthless. And even if it was extremely accurate actually using
handwriting in applications is still a hack as one seems to spend most
of one's time switching from the application to the window that one has
to draw on.

I would never develop on a tablet unless it had a regular monitor,
keyboard and mouse attached because using it as a tablet just is a
reality, that for me, MS has completely and utterly failed to create.
This was extremely to the contrary of what I originally thought, as up
until I actually attempted to use the Tablet I thought that it would be
the best thing that had happened to mobile computing. Sadly it is a
technology that may very well have 3-5 more years before the tablet's
practicality exceeds beyond pressing a button with a pen on some
internal corporation application used for inventory or etc.