idk I'd imagine at this point it'd be like the transition between the 2 AD&D editions. dropping extraneous baggage, probably trying to fix some of the problem spots as well (saving throws, bad subclasses, the old ranger). I want them to just make a 5.5 and be done with it, but the fact they seem reluctant to outright "fix" ranger always bothered me.
not sure why people say that it would go all digital, d&d seems to be thriving on the idea of getting together with people irl to play. then again I'm pretty sure the same people also ignore the rise in board games and insist people only play video games anymore