What is "wireless PC"? you say it as if it's some form of OS to be
installed on a mobile device. If so, there is no such thing and for a
variety of reasons including processor architecture, available memory and
storage, power consumption, etc. etc.
If you need a fairly portable device running a desktop OS like XP or Vista,
look into a UMPC. If you need an actual handheld size device like a
standard PDA, then no there isn't such a thing. Physics and human
manufacturing capabilities havn't yet made it possible. If you need a PDA
sized device, you're going to have to write new software.
One possibility would be a VNC or RDP client on the PDA and a host PC that
they connect to. I've not been impressed with the performance of those
systems in the past though.
Chris Tacke, Embedded MVP
Giving back to the embedded community