By being able to put your STEEM or SBD on a Visa Debit card, it removes the question "what do I do once I get the STEEM".
This is exactly what I've said needs to happen for crypto in general as one of the steps towards mainstream adoption. The average person doesn't want to be bothered with private keys, wallet addresses, and questionable exchanges. This sweeps that away and makes using SBD easy enough for anyone.
Game changer.
It is definitely a step in the right direction...it is hard to for most to deal with the system as it is.
STEEM is actually one of the easier currencies to interact in since it is all basically on this platform.
We will see moves like this help mainstream adoption.