So let's say xbox scorpio releases next October or November.  It's coming with a UHD drive and a small number of consumers have decided to get the scorpio over the neo because of that.  Despite the scorpio being a lot more expensive. 

So would it make sense for Sony to replace the Pro with a revision and release it a month before. The only change would be replacing the blu ray drive with a UHD drive.  

Currently that would cost them about $15-20 per console.  But tech like this drops in price fast.  For all we know it might only cost $5 extra by then.  So they add it in and sell the new improved neo before the scorpio releases.  At $100-200 cheaper too. 

Would this be a good move?  I know only a few consumers care but it could steal one of the Scorpios main selling points.  

Discuss! 

No, it would anger the early adopters.

Not sure if it would make sense or not, but it would more or less confuse the market. That... kind of says it wouldn't make sense, but in the large picture it still might.

What about early ps4 adopters?  Early adopters always lose out.  The reason Sony don't include it now because UHD isn't the future and only a small % even care about it.  But if prices drop a lot for them it might make sense. 

What is actual difference in bill of materials? Seems like you're assuming those numbers, when it could be more like $1 difference.
Some BD drives just need a firmware update.  If it just needs a firmware update, I don't see why next week wouldn't work.
If somebody wants to pay a lot of money for a HDR 4k TV,
I would imagine they would appreciate a full quality 4K disc instead of low bit rate 4k stream.  
Isn't it Sony themself who control the BD standard, and who therefore created the 4K BD standard?

Yes, please. Would be hilarious. "The PS4ProDrive, coming autumn 2017". And some would buy their 3rd PS4.

I suppose they might release a PS4 Pro Slim in early 2018 that featured a UHD blu-ray drive, but physical media is only becoming ever less common. By the time 4K TVs are in enough homes for 4K blu-rays to have mattered, blu-ray discs won't matter regardless of resolution (they hardly do now).

But Sony is selling PS4Pro as a near-4K experience, that you need a HDR 4K display to fully benefit from.
So most of PS4Pro market does have the 4K TVs needed to benefit from UHD Blu Ray, irrespective of over-all consumer market.
I really don't have high expectations that streaming will approximate the bitrate of UHD discs any time soon, just look at standard HD streams vs. standard BD.

No. There's not enough demand for an UHD player.

they will, its just that people would be too confused now with too many different models