I agree with the general direction of this thread but think that the S4 should have Thunderbolt 3, instead of just USB-C. That would really speed up the charging. I'd probably want it to retain both the standard and micro-USB ports, plus mini DisplayPort. Being lighter and having a larger charge should be top priorities for the design team, but the basic size shouldn't change. Making the screen a little bigger would be nice, but a higher resolution doesn't matter to me. 4 GB should be the minimum and 8 GB an option. Adding Core M options (3, 5 and 7) would be really desireable. If the S3 had Core M, I probably would have chosen it over the SP3.