If it makes the RX100 seem antiquated, then so would rest of the G series line, goodbye G7X and G5X.
Sony is expected to soon have a "RX200" consisting of a bigger sensor than 1" which would compete directly with a Canon compact with APS-C.
Why not? 24MP APS-C sensor will make the 1" RX100 series seem antiquated
That said if they do that, it'll be expensive. They might do the 750D/760D/M3 sensor instead, a lot cheaper if so.
But, if they do the 80D sensor, in addition to better AF and ADC, imagine a DPAF Powershot, that'll make potential Nikon DL owners think twice, or even RX10 owners think twice as it'll be a phase detect Powershot vs contrast detect of the RX series, minus the RX1 II. Also nobody has yet to prove the 80D sensor can't do 4k readout, if they throw say DIGIC7/DIGIC7+ in there, it could do 4k.