That's all well and good. However, my contention is that of the layman. I'm simply not concerned about the equipment used nor the director's/cinematographer's/etc. preference. My statements are made in regards to my own observations and preferences.
I believe that the clinging to 2.40:1 as a standard is made under the assumption that the cinema is the ideal way to view a film. (I contend that 1.78:1 is also better suited for this setting, but I digress) Affordable large-screen, high-quality, well-calibrated displays have changed this and ultra wide displays are not well suited for the vast majority of at-home viewing environments. Coupling my 65" plasma with a blu ray and a decent sound system has made films look and sound far better than they do at the theater, it's cheaper, I can eat whatever I want, and I always have the best seat in the house. I've had mostly good experiences at IMAX, (still not as good as watching at home, however) but IMAX and 3D are infrequently mutually exclusive killing that as an option. The only thing I find enjoyable about the cinema is going to see an "event" movie in which it's expected that you're not practicing traditional theater etiquette and are instead encouraged to vocally and sometimes physically participate. (think The Room, Rocky Horror, etc.) Those circumstances are infrequent novelty.
I guess what I'm getting at is that I wish movie makers would let go of tradition, get away from catering to what's established to be "cinematic," and realize that home media is big(ger?) business. I'm certain that I'm only one of a very large market of people that currently see an announcement trailer and say "cool, when's the blu ray release?" I want to be prioritized and catered to, dammit!