Cameron, true to his reputation, is being simple-minded here. It's not all about projections, probability should factor too. I doubt teams would ever base their valuation on a single figure. They would (or at least should) be looking at ceiling and at floor and at how wide the gap between the two is. One of the problems with using projections in fantasy for instance is that two players can be projected to provide the same value but the probability is completely different and ultimately that should factor hugely in how you value the two players.
The other thing is that the whole $/war thing doesn't really work when every team has vastly different budgets. The Rays operate under a huge $/WAR imperative. They will cash in Price because that's there m.o. but most contending teams don't operate that way. They will sacrifice surplus value so that they can project more comfortably into the playoffs. If they have deep pockets, that's just not a big deal. The Rays on the other hand will take the chance that they may be cashing in the marginal wins that will keep them out of the playoffs (they sure do cut it close most years).