Unless you're using pipe, every switch needs to have a neutral present.
Forget "CMOS" and electronics. Even today 'illuminated' switches operate by not completely shutting things 'off;' they let just enough juice through to light that bulb.
Energy codes want things like timers, which means you'll need a neutral to power the clock.
Put in context with other NEC changes - like AFCI's and restrictions on MWBC's - and it looks as if the only way they want you to wire a circuit is Power -> ALL switches -> device. Looks like they want to do away with having all the connections in the fixture canopy.
