Ryan,
I once heard a speech by the founder of Cobra Golf Equipment, and it was based on the idea of the difference of "fads" and "trends" with fads being short lived, and trends having some legs. It sounds like your gca may have been confusing the two.
Yes, you can bet that it will change, possibly in several divergent directions at the same time, or branching into minimalism, superminimalism, situational minimalism, etc.
In addition to changing with tastes, it will change with sites as Tom D mentions, construction technology, new environmental rules, and things we can't even begin to imagine, like new grasses. Golf Architects generally do what's best for the client, and minimalism will always be one solution, and a preferred one on great sites.
I would be interested to hear an analysis of the economic and "social" benefits of minimalism. I understand the theory of economic benefits - and there are some, but not as much as presumed, because earthmoving represents perhaps 10% of the overall budget for a golf facility. Moving less may reduce ongoing maintenance costs (i.e. avoids the slower mowing production on mounds).
How you think "minimalism" would improve society as a whole? Just curious.