I was thinking exactly this and thanks for posting. Beat me to it. This makes ever more sense for such a device. I wouldn't be surprised if it was included.
Update: here's the old Apple Insider post:
http://www.appleinsider.com/article...lcd_display_that_also_takes_photos_video.html
I could see using this also for "white board" real-time conferencing via a VoIP type application (not sure if there are any for the iPhone today...). That'd be a killer feature for me (I have a love-hate relationship with flow charts....).
The combination of the A4 with PowerVR SGX SoC might mean this is patent is finally for commercialization. By some indications, the iPad was in development prior to the iPhone (i.e. consider the iPhone a scaled down version of the iPad instead of the other way around); it's just that the technology wasn't there to bring it to fruition.