As a boarder who switched from skiing some 15 years ago at 35 years old, I like the idea of opening up golf to alternative "gear" and alternative "ways" to play the game, instead of making it's courses available for completely new uses.
Snowboarding saved the ski industry, not just by providing a new way to get down the slope, but by providing an alternative that is easier to master, more fun to experience, and lets you dress more comfortably and casually. Snowboarding broke through some barrier (an uptight image perhaps) that limited sking's appeal.
Image
I think golf suffers from a similar image. Dress codes, slow play, complicated rules and too much etiquette permeate the game. I'm not suggesting we abandon rules and etiquette, just lighten up a little (adopt a "boarder" mentality). Speed things up, avoid pre-shot routines, just hit the ball, loose the golf shoes, loose the golf carts, untuck your shirt, carry less clubs, lag putt without removing the pin, talk while others hit the ball, hit out of turn, even walk on each other's putting lines. Just keep the "play it as it lies" rules and have fun.
Variety
As Reef experienced at a course in So Cal, I'd like the option to play "disc" golf on a "real" golf course. But I'd also like to see more variety offered in how I play "real" golf. I'd like to see the course be rerouted every several times I play it. Some days you play from the 1st tee to the 9th fairway to the 8th green, other days you play the "intended" 18. Course operators (and golfers) could have a blast finding unique routings. Some days the course might play 18 holes, some days it might be 12. But it would never take more than 4 hours to finish.
Simplicity (and affordability)
Simplify the game so all you need is one single club that you adjust for height and distance. Just put a few balls and tees in your pocket and off you go with your one club (that also serves as a walking stick). Part of snowboarding's appeal (and disk golf's appeal) is its simplicity. One board, no poles.
Fun
It might be fun to get around the course on a bicycle or a mountain board (a skateboard with oversized "all-terrain" wheels)... all more practical if all you have to carry is a single golf club and some balls. Gets rid of the need for a golf cart too!
I've tried speed golf. I couldn't breath after the 2nd hole!