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.
1. Miners signaled for Segwit because if they didn't BIP 148 would become active. They did not vote for it or implement it.
2. They removed Segwit from their code, the transactions per minute have dropped to pre-Segwit levels.
3. So many do not understand how Bitcoin works. Only mining pools running compatible software can upgrade BTC. Coinbase can add Segwit all its wants, no one will process Segwit transactions.
Segwit was not implemented.