A faster first confirmation is an enormous benefit if we want alternative currencies to be used in brick and mortar stores and restaurants. You can't have each person in line waiting 10 minutes or more.
Not really. Brick and mortar stores do most of their volume using 0-conf credit and debit card payments that take weeks or months to become irreversible.
Handling that situation is called "risk management", and there's a lot more to it than people who are hung up on block creation time realize.
There is effectively
no difference at all between a 2 minute block time and a 10 minute block time for a brick and mortar merchant. Both of those times represent an unacceptable delay at the cash register so no POS cryptcoin payment system is going to wait for blockchain confirmations. They'll operate on a zero conf basis, using systems that make the risk of reversal predictable and therefore something they can accurately price.