It is likely that more wireless technologies (bluetooth and wifi) will be merged into the chip in future versions.There's also the potential that a good portion of the logic moves into future A/M series chips themselvesRemember the W1 chip which got replaced with H1 then H2 chip? That seems to be a possibility with the C1 chip, although they cannot rename it as M1 since that has been used by MacBooks and iPads and M7 was first used in iPhone 5s as motion co-processor.