So in summary, from reading this thread:
1) Miners voted for Segwit, and it got approved.
2) Most of them haven't implemented it yet, so the block size charts don't show a huge change.
3) Coinbase say they're going to go live with it in the next few days
Sounds like we need to wait a little while to see what happens.
SegWit is not something that miners implement! they voted for it because they have the hashing power.
it is activated and will be effective when people use it. you can see that it already is happening but slowly. we already had 2.1 MB blocks with a lot of transactions in them.
in short it is now up to users and services to use it if they want to get the benefits of SegWit such as the capacity increase.