Kyle,
I assume you were talking about the opportunity cost of golf to the golfer, and you are right that there are many alternatives to walking around outside for 5 hours at a cost of $40. However, golfers will still play golf. Thats what they do. Golf is a good game, but it's exclusive nature is harming its development currently. As demand wanes in its traditional demograhic, golf will adapt (as it is already doing through short courses, executive courses, six hole courses etc) to attract new players by reducing the aforementioned opportunity cost. This may be the new direction that you are talking about, but it does not represent a threat to the game, but an opportunity for it to reinvent itself and safeguard its future.