Private cloud is inevitable, but that doesn't mean the road is going to be smooth. One of the major roadblocks is going to be your own staff, so we can expect the same tar-pitted demise of traditional server and storage infrastructures as we experienced with the decline of mainframe computing.
Why not get out ahead of the curve, rip off the Band-Aid, and start to realize the substantial benefits of private clouds? We should all be so lucky. Truth is, substantial change is hard and is met with resistance.