I think the guard is certainly changing. Remember the "Big 5" as they were called some years back? (Tiger, Phil, Ernie, Goosen & Singh) All 5 of them are currently irrelevant in the world of golf. I still think Tiger has one more 2 or 3 year stretch of dominant golf and Phil might get one more major, but the sun is setting on these guys.
It is a new era in golf. It will be interesting to see if anyone in the 20 something set can step forward and win multiple majors, or, if we get a revolving door of winners.
I'm not sure which way I like best.