Does this mean that there will be more than 21 million bitcons?
Ehmmm...no??But I am not a very reliable source for answers like this
https://github.com/bitcoin-dot-org/bitcoin.org/pull/1165
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2015-December/011865.html
"TL;DR: I propose we work immediately towards the segwit 4MB block
soft-fork which increases capacity and scalability, and recent speedups
and incoming relay improvements make segwit a reasonable risk. BIP9
and segwit will also make further improvements easier and faster to
deploy. Well continue to set the stage for non-bandwidth-increase-based
scaling, while building additional tools that would make bandwidth
increases safer long term. Further work will prepare Bitcoin for further
increases, which will become possible when justified, while also providing
the groundwork to make them justifiable."
Just to clarify... segwit would likely result in the tx level equivalent of 1.75-2MB blocks. Only if every transaction was multisig would the 4MB equivalent be reached (translation: it won't).
Precedent that hard forks are "bad and scary" remains firmly in place, to be rolled out again the next time we have this argument.
This is from two weeks ago, so I wouldn't hold your breath waiting for a market reaction.