time to invest in handheld software development?

Now, handhelds are inexpensive enough to be interesting to the mass.
Also, they are now powerful enough that they are close to PC (or Apple) computers, so that we can leverage the PC/Apple software experiences.

I anticipate that within a few years, everyone will have a PDA, with real key board, GPS, camera/scanner, OCR, recorder, voice recognition.

I will begin to look into handhelds. Basically, they should be just like a PC/Apple 10 or 15 years ago, the only difference is that they are smaller and portable.