you might not see "blockchain transactions" but you will see some indication that the transaction is "ok" ie: the red light turn green, or a final receipt, after the requisite number of confirmations is achieved.
No. We will not. Please go back and read my previous posts about this. Confirmations and blockchain transactions have nothing to do with how Bitcoin sales will be conducted on a large scale. It doesn't matter what type of currency is in use - US Dollars, Euro's, Bitcoins, Litecoins, squirrels, pigs, barrels of oil, Storepoints - ALL these currencies get handled and WILL be handled by payment processors (as they do today).
Point of sale transactions are instantaneous - because we are not actually doing a bank transfer at the point of sale. Even if a coin appeared with 1 5-second confirmation time, it would still never be able to match the speed and functionality that Visa / Mastercard payment processors provide.
You'll still be paying with a 'card' it's just that the money will be coming from a cryptocurrency account managed by the appropriate payment processor. (This is already happening - look how the cryptocurrency exchanges work right now).