Because Sony really fucking hates getting money from PS4s and then getting more money from people buying more Sony content on the PS4.

It's basically the same reason why Microsoft doesn't have a game console, so that people buy more Windows. Oh wait.

I'm not exactly ready to invest in 4K Blu-Ray yet. It may not be worth it soon. However, I do find it ironic that it is Sony's own format and they're not supporting it on one of their flagship products.

I think Microsoft is paying Sony for the blu-ray tech in a way. Not just Sony but others as well like Pioneer, Samsung, etc. Don't quote me on that though.

I don't think Microsoft automatically makes money off of sales of games that run on Windows. Microsoft does make money off of new games that sell on XBox.

You know who also makes money from people buying games for their console? Sony. So insisting that Sony would intentially make PS4 less desirable just to sell something that makes them way way waaay less money is ridiculous and shows that some people don't know how to business.

It's like saying that Microsoft kills Xbox music capabilities so people buy more Zunes.

Watch this instead:  https://youtu.be/gMbIYZl393k?t=435

Prachter Factor episode 40, 7m15sec into it explains this so much better.

He goes into detail about how only like 10% of the market place have 4k tv's.
And of those 10%, only like 20% of those 10% dont just stream movies instead.

So the question becomes... should the console be 25$ more expensive, so 2% (of the total market) can use it to watch 4k blu-rays?

He thinks Sony where smart by not forceing that cost onto the consumers (98% of the market cant/wont make use of it).

Movie rental is moveing towards streaming, and away from physical media.
Thats just the reality we live in.

This pretty much sums up the question and is the perfect answer.

The latter is a lot more implausible than the former. People DID buy at least the PS3 to  play movies.

As to the topic at hand, the actual stopping mechanism is Sony - but there isn't a demand for 4k BD, and there are barely titles available to watch in it, so...yeah.

Exactly... And to be clear, I have posted quite a bit about the topic, I think it is worthy of people's attention,
and am genuinely curious as to the reasons behind it and the exact technical status of PS4/Pro capability.
(if the drive is BDXL capable, then it is merely a firmware + player software update away from BD-UHD playback)
(whereas if it is not BDXL capable, which the video doesn't explore, then that is not possible on same hardware)
But this video doesn't illuminate any of that.  It's just a bunch of BS. Funnily enough, the closest it gets to "Why?"
is speculating on Sony A) pushing sales of own standalone BD-UHD players B) pushing streaming as future etc.
Great.   Except both of those can't be simultaneously valid, can they?  Yet they are both presented as de facto true.

I believe it has a much to do with lenses as laser itself, although one could lump those together as one sub-component if not picky.
And of course a large number of current BD drives have the BD-UHD capacity (as long as they are BDXL capable).
I would like to know how many non BDXL drives are even being manufactured now, never mind in 1 or 2 years.
If there is no market for them outside Sony, then I don't see much basis for a cost benefit, given actual difference in BoM.

Making up numbers is fun, kids!
Seriously, figures like $25 difference just aren't supportable.  Some have pegged it at $15 I believe,
although IMHO it can very well be much less, more like <$5, especially if codec/copyprotection licencing is not covered.
(Sony could make the UHD-BD player software a purchasable down-load, so only those interested need to pay licence fee)

Or DVD.... or CD... or... any form of physical media... just like the GC, Wii and WiiU.

Or they find out it only does 720p :D

Nah seriously I dont see the anger of people, surely we want the best gaming device possible, TV TV TV yeah, I've said it before I aint upgrading to yet another media format, not worth my time and effort.