I agree with SomeStupidPoint that at the current speeds it blows away both ACH and wire transfers if you need the transfer to happen pretty quickly but don't want to pay usurious fees.

Every major blockchain is trying to shard or find other solutions to increase scalability of confirmations. Most coins have it on the 2018 roadmap to deliver lots of these improvements which will bring the transaction times way down. If some coins stay slow, then others will be used instead for situations where you need to compete with the speed of a wire transfer.