It’s not the use of phone as much as the ability to dine at your own pace.

Server arrives, but you’ve been chatting and catching up, so you’re not ready to order. Then you get ready and server is nowhere to be seen.

Ready for another drink, sit on empty a little too long looking around to flag him down.

Ready to leave but have to sit and wait for the server to bring the terminal.

Instead, scan the QR to order, add items whenever, pay whenever you want to leave