Looking at my current queue, I have 106 DVD-only movies, and 60 streaming (streaming may have TV series condensed whereas DVD shows them as multiple entries).
That's not a great ratio IMO and many of the movies on my DVD list are not that "oddball" at all. Things like Leverage, Burn Notice, the new Wall Street, Inception, The Unit, The Social Network, Transformers (new), etc. (and no comments about the quality of the movies listed -- they're in my queue because I haven't seen them...)
Of course, I have a couple dozen educational documentaries and the other 'oddball' stuff which I had in mind when I submitted the head article as well.
Until they can at least get 90% coverage on streaming, I can make the case for still needing the occasional disc. After all, part of the enjoyment I get out of Netflix is *NOT* having to rent only the "top 10 new releases" and other crap like Walletbuster used to be packed with...