I have been reading that thanks to Bakkt will be possible to pay for for example Starbucks with btc without all that fee
It is why Bakkt is so important giving crypto chances for adoption
That's wrong. You won't be able to use Bitcoin in any Startbucks shop. The deal here is that you'll be able to sell Bitcoin to USD through Bakkt, and then use these funds to buy a coffee or whatever else that Starbucks sells. As always, it were the shitty news outlets trying to convince people they could finally spend their coins in Starbucks.
In order to stimulate adoption we need stores actually allowing customers to pay with Bitcoin, even if they use a payment gateway. If you are converting your coins to fiat to spend them, what's the point of Bitcoin then? In that regard, you can just as easily keep using your debit card to conduct these transactions.