Seems totally far fetched, but if you're interested in the business of golf and/or like Tiger Woods, ESPN The Magazine has an interesting article up on the notion that Tiger could just ditch the PGA and start his own tour.
More importantly, Woods can undo the PGA Tour's vice grip. The Tour has excelled as golf's Microsoft, building its own business while foreign tours struggle to compete. Seve Ballesteros dropped out of the PGA circuit in the '80s because of the 15-tournament minimum, and a generation of European golf pros followed his lead, torn between the opportunities of the PGA Tour and their loyalty to family and homeland (and appearance fees).
Former top-ranked golfer Greg Norman suggested a world tour in the early '90s, only to be snubbed by commissioner Tim Finchem, who later proposed the World Golf Championships. Even that fizzled, going from international in theory to American in practice. A Tiger Tour could finally grow world golf to a new level.