Mac OS Server will have a tough time breaking into the ranks of corporate big business IT groups; there is too much competition from more established players such as Sun/Solaris and perhaps even from Linux. There is, however, significant opportunity in the home and small business market for Apple to provide server solutions both for Mac-only as well as heterogeneous client deployments. If Apple can offer a powerful, simple to use, and well priced solution, they could increase their marketshare in the workgroup server area. Imagine if Mac servers and clients "just worked" together right out of the box, and Mac OS Servers had simple setup choices for consumers much like some of the network attached storage solutions that have been introduced over the past few years.
Mac OS X 10.1 looks like it could cover well the technical requirements of such a workgroup server solution (although currently lacking the consumer-level simple setup); sadly, Apple hasn't listened well to the market regarding product pricing. The Server OS product, especially the 10-client license, is priced perhaps 200% over where it should be to attract home and small business users. Pricing the "consumer" version at $250 would make it attractive to that market, both sold separately and packaged with hardware. A G4 system configured to suit a low level SOHO server (733MHz, 256 MB RAM, 2x60 GB EIDE disks, CD-RW) is $2,149 without a display or the sever OS; a more aggressive approach would be to sell such a system with the 10-client license for $2,000 and a cheap 3rd party CRT display option.