We don't see any fear of forking. Whether or not Linux will be fragmented will continue to be debated. However, Torvalds said fragmentation can actually be a good thing. Fragmentation has been the bogeyman of Linux. Torvalds said during a recent trade show address.
Fragmentation is a good thing to some degree.
What you really want to do is have a market where everybody gets to do his own thing. Then you have a market that is not controlled by one entity. But at the same time, you want to avoid the bad things that come from fragmentation, such as the infighting between vendors, where people spend a lot of energy on fighting rather than making a good product. Unix's problems came when vendors differentiated their products for the sake of competition rather than to improve the product for their customers. That same sort of fragmentation is currently plaguing Java.