Would it make sense for Sony to add an UHD drive in 12 months?

[Kerotan]

mutantsushi said:

Kerotan said:
Currently that would cost them about $15-20 per console. 

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?

You are ignoring that they can also buy regular blu rays.  Modern 4k TV'S do an awesome job upscaling them to 4k.