How many coins are there that have an actual use.
For example playkey will have one . Factom or Stratis do...I think they probably more clients though.
Ether does (within the Etherreum ecosystem)
What are some of the better ones?
ROTFLMFAO, you ask for use cases and you state as an example one that "will have one" hah that hilarious. Ask any of them and they will all "Have one". BTC (you didn't specify alts), LTC, XMR, ETH off the top of my head most others are pie in the sky or lies.