You didn't upgrade after the Epson 4000 in view of the predicted market changes ;-)
Till 2035 or something like that the majority of the population will have grey hair and they also have most of the money to spend. They do not adopt technology that fast to decorate homes they intend to stay in for the rest of their lives. Their taste becomes more conservative how modern they once were. So I do not see it happen in the next 15 years though I shared your thoughts on the subject for some time.
That change may come with the younger generations and in areas of the world where the demography and wealth distribution is different to that of our populations. I guess it will also go along with a different view on copyright. For photographers it is harder to go on tour than it is for musicians. We all know what is happening in that market. If that display isn't showing images that were not paid for it is likely showing images from big distributors, the images we know already and the neighbours have the same and we confirm one another in our taste.
In the busy world we are in with fast media, mobile phones, ever changing landscapes, it may be nice to have some well known, worn pieces of art in your home that have a lower contrast, lower gamut, but nicely blend in with the room's illumination and colors. Like the portraits of relatives that are selected on how we like to see them. There are already several screens in that house with all the advantages you describe and they didn't replace the art on the wall. Would Balmoral Mist worth the essay on http://luminous-landscape.com/essays/balmoral.shtml
be any better on a translucent screen than it is now in print on Photorag or a bromide? It wouldn't be the right media for the image in my opinion.
Paper manufacturers have a hard time right now. Raw material and energy prices are high and demand outside the packaging industry is less than it used to be. Offset, rotogravure, newspaper paper in this case. The predictions that the print market would once feel the growth of other media and the internet dates back a long time. It actually sold more paper in manuals for digital equipment and to feed the millions of printers attached to them. That effect is gone and traditional use of paper is declining (but packaging).
With a history of slow acceptance of new media in musea, galleries and collections I doubt you will see them acting as forerunners in this change. For them it actually never becomes a change but just another way of presenting art next to what is already accepted. Not so long ago I walked through the local modern art museum with the man in charge of the print collection. Talking about the problems keeping the modern pieces (1920 up to now) available for exhibitions. Not just prints but movies, performances on video, installations, giclées, color photography. It's a nightmare compared to the conservation of old paintings. Then there is the issue of the value with insurance etc. That already conflicted with the introduction of conceptual art. The insurance company rather repairs the piece that was damaged by a flood than have it replaced with a new copy by the artist and have the old one destroyed. They couldn't grasp the concept of conceptual art. The same change of mind would be needed when art is hired instead of purchased.
I think you can upgrade your printer another time before things change.