Except for VUDU streaming, I don't ever expect to see a Disney title available in 3D in the US on physical media again. Disney has pay deals deals in place with most VOD already. I do not believe Amazon does any 3D at this time. I've only seen VUDU. They do have a deal in place with NF streaming, but there has been no Disney titles to date in 3D, even some titles that were released in 3D (i.e. Tinkerbell). At any rate, I'll take physical media over streaming media any day until there comes a time when streaming media is bit for bit identical to the physical disc.
S~
Sorry but you seem to just not be into 3D enough to know about these things. Amazon does have a couple 3D titles but they are rather poor foreign productions and of low quality. Hardly worth mentioning.
Amazon product ASIN B00DKR52A8
Netflix also has a small collection of movies and some Asian 3D productions, about 20-25. They are good technical quality but require a fast internet connection with sustained 13-15 Mbs download speed and compatible device. Not all Netflix devices will get Netflix 3D and many will not even list those titles for you to know about. It all depends on the app and the device.
Sony Playstation Stores has about the largest collection of 3D movies in excellent streaming quality, about 100+ titles now. They have a deal in place with Disney and are among two that have the Disney 3D movies offered BEFORE it is released on Blu Ray, usually about 1 month before.
Vudu is the other service that offers Disney and other high quality 3D current movies. The Variable Bit Rate quality is a visual match for the Blu Ray but in most cases the audio is only 5.1 DD encoded while the Blu ray when it is released is usually 5.1 DTS, and in some cases 7.1. While Vudu has a couple titles in 3D 7.1 from Disney, they have no control over this according to one VUDU engineer. They can only offer what the studio sends them. I currently have a copy of Big Hero 6 in 3D from VUDU a full month before the announced release of the 2D and 2 months before the announced release of the Big Hero 6 3D on disk. In addition, VUDU offers the full Blu Ray planned package with a 2D, 3D, and many bonus features in what you buy on these titles. It's like having the 4 disk set absent a box to sit on your shelf.
Can't find new Blu Ray 3D from Disney locally? The fact is Disney has entered a delayed release of various hard media depending on the country and unfortunately, since Frozen, the US seems to be delayed by about 9-10 months. Frozen all regions version was released in the US in November 2014. But it was available on Vudu in February 2014 and in March in the UK on BD. In April it was available for Rent.
Finally, in today's marketing of hard media first run movies are being released at different times in different countries and some with restricted region codes. To take advantage of these releases before they become available in the US, you may need a region free player. There are many of these on the market and they are not expensive. Even if you have an expensive Oppo, you can get a USB dongle that will convert your OPPO to a specific region for about $70. Then order from Amazon and have the disk shipped in. I have Maleficent 3D and Planes Fire and Rescue in Region B and they play fine in my all regions 3D Player.
Just because the title isn't on the market for home video when you feel it should be doesn't mean Disney or any other studio has a blanket policy to end 3D disk distribution. However, Disney has stated they will be favoring digital media over hard media for the future. If one refuses to embrace the fact that digital streaming will one day replace hard media and that is the direction the industry is heading, then better find a new hobby because you will either join in on the fun or watch nothing except your old collections. As for the technical side, demanding that all distribution methods match bit for bit to BD is silly. It doesn't even make technical sense since the codecs are not the same. What we can insist on is that visually and audibly, streaming and downloadable media match the quality we are looking for, whether it be DVD, BD, or 4K content ( which BTW is the only way you can get it because BD do not support that high a quality yet. All 4K content, now, is downloadable to a local server. Netflix 4K is also experimenting with streaming as opposed to download. By next year we may get 4K disks but it is just a temporary measure and my prediction is it will be too expensive and not sell well. Currently the Sony Business model is the most affordable for 4K content.