On mining pools all miners get rewarded with the analogous CPU they have used.
I don't know exactly how many satoshis will be generated on every block after 2100 but I know they will be very few. Imagine splitting 1 satoshi. How? Will the bitcoin community create the nakamotos?
1 satoshi = 1000 nakamotos for example. Too dumb question, tho, since we can't know a damn thing about that era. Some say that life will end after 2100 due to loss of natural supplies.
Do you think the year 2100 is very close? Only God knows what will happen in the future. New technologies will be created in the future. Many new transaction systems will be created. So there is nothing to think about right now.