The fact of the matter is that love it or hate it, Git is now the most widely used VCS on the market in corporate settings (see e.g. http://www.itjobswatch.co.uk/). More importantly though, it is also the de facto standard for version control -- the lingua franca of source code management, communication and collaboration. Subversion and TFS still have significant market share, but everything else has pretty much fallen off a cliff in the past couple of years.

Also, many of Git's most powerful features have nothing to do with being distributed. Easy branching and merging, private versioning, bisect, rewritable changesets, stash, and the ability to cherry-pick individual changes within a file to commit, back out or stash could all theoretically be built into a centralised system.