It's interesting that MGM (and EON) have ditched 20th Century Fox as their home video distributors as of 6/30/20.
With regards to 4K HDR, apparently the added pixels of 4K really only makes a difference with monitors 60' on up (I have a 55') the real difference maker with sets of any size is the HDR which really improves contrast ratio, widens/expands the color pallet and improves depth of field. Looking forward to checking out Skyfall and SPECTRE as their their digital intermediates was finished at 4K. The contrast ratios are superior and black looks much more 'black' rather than the grey that passes for black in lesser formats and the picture appears brighter and has a bit more definition and detail. I only had a chance to watch the TB PTS and have to say that it is superior to the Blu Ray in overall picture quality.
Fortunately, I have been upgraded to a 4K HDR cable box so along w/ my 4K HDR TV I can take advantage of the 4K. I have a new subscription service with my new cable TV plan called EPIX which is owned by MGM and they are featuring many of the Bond films on demand in 4K HDR.