I'll pay a couple extra dollars for the BR + DVD bundles (Although, all my stuff plays BR these days)... I think it's fairly standard to get Widescreen these days as well. I don't remember any recent 4:3 releases for newer titles.
The main issue I have is "release day" discounts of $~10-15... followed by months of $~20-25. I hate missing a "must have" and then waiting until the price is reasonable again.
http://www.amazon.com/dp/B00CTSDDVO/ref=wl_it_dp_o_pC_nS_ttl...
http://www.amazon.com/dp/B00867GHS8/ref=wl_it_dp_o_pC_nS_ttl...
I don't mind the 2-disc BR/DVD bundles, I just wish I had the option to buy a 1-disc BR instead. It gets even harder when you want a 1-disc 3D BR.
This tells you the item was not a "must have" then, or you would have bought it already, rather than waiting...
personally, i know not one single person who still buys physical video discs anymore. personally, i can say that demand for blu-ray is non-existant.
what would be useful, here, would be some sort of data that compares usage/adoption rates for units of time after a formats release. how many people are using blu-ray X years after it became available, compared to DVD, etc.
i would expect it to not be as popular as DVD or VHS before it, but expectations and anecdata aren't terribly useful.
If there's any repression in the movie market, I would blame prices/multi-format bundling. I don't want to buy a six-version pack with two different digital versions, a Blu-ray copy, a DVD copy, a 4:3 DVD copy, and a VHS copy for $40. I want ONE DISC, Blu-ray, for $8-10