There are problems facing the computing community as companies try to to determine how to approach the open source world and model.
For companies already on the open source side of the fence - BSD, Linux - there are no issues, they've already made their decision.
But for companies in the commercial/proprietary world, some are beginning to realize that closing themselves off to open source may lead to problems down the line. Some companies have already worked it out - hence Sun released OpenSolaris.
Where it will really begin to hurt is in the smaller companies, those that don't have multi-billion dollar budgets to keep their programmers and developers happy, but who still want to compete. There are lots who potentially fall into this category. Some of them, like BeOS, have already fallen before choosing to go the open source route.