Joel,
I think you are completely misunderstanding the technology and the benefits of POET. More DD is required on your part.
POET replaces the need for multiple chips and with the efficiency gains in terms of energy use, the battery would also be much smaller.
The chip that would go in a smartphone is expected to be no bigger then a finger nail. Why do you assume that a 100nm chip would need to be on a 300mm wafer? We aren't talking about silicon anymore.
Also it seems likely that a PDA has requested 100nm so if thats what they want to see, thats good enough for all of us too.
Remember this is also PET, the optical side is a whole other ball game in terms of speed and efficiency gains.