Cash Register vs Tablet: Ringing Up Customers (CASH-LESS)

I agree that it is pretty ridiculous that the cash registers are not used for payments, but I do like that the tablets. The tablets make it easier to move throughout the store in order to ring people up. From what I remember in the sims 2 the lines used to get so long that they would block other sims from moving in the store to the items they want.