I just made my first purchase directly with Bitcoin last week. It didn't went as smoothly as with card, but I think that both parts will learn and improve the system. It's a good start however and it's the way to go.
For me, at thuisbezorgd.nl, using bitcoin was much smoother than using a creditcard. The only thing that slowed it down was entering my PIN-code on my phone app.
The website showed the amount, and a QR-code. A quick scan with my phone, and it instantly said "paid" on the PC-screen.
PIN-code: 6 digits.
Creditcard: Name + 16 + 3 + mm/yy = 30-40 digits.
The problem was that the payment processor only gave a 10 minutes time frame for the Bitcoin transfer.
Silly me, I did the transfer from Poloniex (I wanted to withdraw anyway some from there). Just Polo was this time slower than usual, the coins were transferred after the time frame expired and then I had open a ticket, ask the payment processor check the payment, .. yeah.
Next time I'll use my own wallet and maybe they'll use wider time frame.