There is no way on earth that they will render at 1080. If it was 2007 it might have been 2k.
The master will have been rendered into a DCP.
What gets delivered to the streaming service is another thing.
what then ends up at your screen is even more of a guess.
A 4K dcp is a JPEG2000 stream[1], with 16bit colour. Something like 60-120 megabytes a second. Obviously this isn't practical to stream to consumers. 4K over a stream is always a balancing act, more often than not it drops to 1080.
The master will have been rendered into a DCP.
What gets delivered to the streaming service is another thing.
what then ends up at your screen is even more of a guess.
A 4K dcp is a JPEG2000 stream[1], with 16bit colour. Something like 60-120 megabytes a second. Obviously this isn't practical to stream to consumers. 4K over a stream is always a balancing act, more often than not it drops to 1080.
[1] well normally it is