Is that means Bitcoin finally will be faster?
Will it have cheaper fee's? because right now I don't use BTC thanks to the high fee's..
Segwit is "locked in" today, but not activated. There is another epoch to wait through, which I think was originally intended to ensure that miners were ready for Segwit activation (thus preventing orphaning). The BIP91 saga sort of made that motivation moot, but we still need to wait for one more difficulty retarget before we can start using Segwit transactions on the mainnet.
As for fees, there is an immediate bump in capacity, but the real savings will come when we start to see a usable Lightning Network.