Because of the 2008 revision to the PDGA technical standard, we now know there will be a limit to how wide a rim can be. Every manufacturer I talked to told me that they felt discs would continue to get faster. Will overmolded discs be the trend over the next ten years, or will there be a new technological breakthrough? Only time will tell.
As a member of both the PDGA Tech Standards and Course Committees, I will be biased toward blocking any advances in speed that can be prevented, via modification of tech standards, as detrimental to the game. Faster discs have already undermined the quality of the game balance in relation to what designers are able to do with updating course designs.
The battle here is whether the game is intended to simply be 18 holes of various varieties of reachable par 3 holes (basically disc darts) or evolving more toward a golf model with a healthy mix of bona fide par 4s & 5s. I would hope we could strive for the latter but technology, the need for speed/something new, and what seems to be more popular with rec players may force the sport to remain mostly in the par 3 world. The majority of existing courses can't be extended since they are landlocked either physically or by dictate from the parks department for the amount of land available.
Ball golf has been locked in this technological battle for many years to retain their balance in the game. Our sport wasn't smart enough to do the same thing as fast. Our "technology horse" is already too far out of the barn but maybe can be kept in the corral if you also believe our game should include par 4s & 5s.