IBIS, native GPS, EVF, Focus Peaking, fully articulated LCD with touch screen, dual SD slots, native AF Zeiss lenses, weather sealing, size, and grip... etc it's all very tempting.
But it's kind of meaningless to me if the AA filter ends up being tuned to be very strong or if in addition to that the SLT mirror is not removable or it causes AF to not work at all any more.