There is a recent answer by a Sr. Technical Evangelist at Microsoft that contradicts your opinion on this matter. Although it depends on if you count “in 2016” as “any time soon” or not ofc. 
It has interesting quotes: “Currently, UWP is expected to be available on Xbox One in 2016.”
“Note that UWP on Xbox One is in addition to the current ID@Xbox program” (You don’t have to be in the ID@Xbox program to make UWP games.)
“For developers working on Universal Windows Apps, you’ll be able to test your games on a retail Xbox One”
The guy seems to know what he’s doing, so I don’t think he would have quoted these things if they were not applicable in 2016 anymore.
If you still doubt releasing UWP games using retail Xbox Ones is going to happen in 2016 then I can’t really help you. Microsoft is saying pretty clearly that it is.
Passing by this opportunity, because UWP apps can optionally also be released on a storefront you don’t like makes no business sense at all…