Whilst on hols abroad, I noticed a lot of POS in various stores have a second screen for customer information, showing simple things like item, cost etc. etc.

It would be great to have this on the POS to improve the customer experience and speed up processing times during peak hours.

it could show offers/starbuys/email signup requests. a quick google image search shows something like this

it could even be a 'cheap tablet' that links somehow to the terminal ID