And the biggest feature of 7.1 is that within a few weeks 4 out of 5 iOS users will be running 7.1.
http://arstechnica.com/apple/2014/01/apple-80-percent-of-act...
http://arstechnica.com/apple/2014/01/apple-80-percent-of-act...
Anecdotally, Several of my officemates have had this issue.
It would seem like starting their base model at 64GB would be very consumer-friendly, and have a very low cost.
My kids though had about 50Mb free each.