While I am cross pollinating a thread (the dimly lit room thread) sadly, for most courses, I see little future in rough at all. As we dumb it down to attract more occasional playing Millennials and beyond, I believe golf will find it needs to be ever easier. While Melvyn Morrow and traditionalists have a fit, the truth is, life is getting easier and our sports pursuits will probably need to adapt.
For some courses, which will follow ultra relaxed rules of golf, I can see not only no rough, but then golfers taking their one foot square of Astroturf everywhere and/or a tee, to make sure they get an easy to hit lie everywhere they happen to be.