My primary concern going forward is that iPhone 5 will likely see 1080p video and an 8mp camera, further eating up disk space. I'd prefer 128GB, but I don't think that is possible.
Doubt very much you will see 1080p. Apple has made its bed in 720 for the time being. It's not like the current 5mp camera can't do 1080, which is less than 1mp.
has done this before with the ipOd touch 3rd gen prototype. They DIDN'T release a camera that same year for the ipOd touch but added it to the following years 4th gen touch. SO it is very possible we will see 64gb option this year... BUT SOLELY JUDGING BY THE PRICE OF NAND FLASH... there no way