yeah. But I imagine there might be some stickiness with multiple terminals...I guess if each terminal has it's own queue of order to be sent it wouldn't be a problem. There def would be issues with credit card processing though.

Credit card processing isn't the only problem. That goes down with the internet right now too. The problem is communication between the terminals, kitchen, bar, ect.

The way POS systems work is if you ring food and drinks in a terminal, the drinks get sent to the bar, and the food gets sent to the kitchen. If your using a web based point of sale system and your internet connection dies, none of this can happen. All the sudden you're running the orders around the restaurant by hand (which would _never_ fly).