Also, we're still hearing stories about merchants in the US starting to accept Apple Pay, whereas it worked fine in almost every retailer in Canada the day it was available - even though it wasn't available in Canada for a long time, American visitors (or Canadians with American credit cards) could use Apple Pay on launch day at any retailer that supported tap-to-pay, which was easily most of them.
It’s a network effect thing. Because tap to pay wasn’t supported by the POS vendors US consumers did not get much improvement in experience because of it, so there wasn’t demand from merchants. With Apple Pay there is a huge improvement for consumers (not having to carry the credit card) it has finally forced merchants and their supporting POS vendors to support it.
Between that and the disruption in the POS market the iPad (and similar devices) brought, POS vendors have had to become more flexible.
Tax fraud? I've never seen a card reader in a restaurant (here in europe) where they couldn't either enter a completely arbitrary amount to pay, or add a tip.
I do know that some restaurant owners are removing these things. They do not want to look like Olive Garden :)
But it really depends on a restaurant: is it high end, type of food / drinks, it is a date place, etc.
Majority of restaurant is all about experience and event payment system should match that experience.
I'm in the UK. I go to many high-end restaurants, cocktail bars, etc. Portable card terminals are essentially universal in these places. The fact it's the same everywhere is a feature, not a bug.
It's quick. Your card never leaves your sight. No pen is required. Payments up to £100 can be done using contactless on a physical card. Even higher amounts with smartphones/smart watches. Tipping is often integrated into the terminal where tipping is common. It's rare to have to put the card into the terminal.
I don't think it detracts from the experience. On the contrary, I think it streamlines the bit between being finished and wanting to leave:
"Please can I have the bill and a card machine, please".
They’re almost universal at this point to the extent that not to have one would be unusual.
Where you live maybe.
In Japan, you don't pay at the table, you get up when leaving and pay at the exit. If you're at a high-end establishment entertaining guests, this also leaves you the opportunity to "go to the restroom" late in the dinner and pay ahead of time so that the "mess" of payments is completely forgotten.
It also means waiters don't need to run around the place with cards/readers/cash, you don't need to fumble when you left your wallet in your coat that's been hung up, don't need to squint to read receipts in the dim mood lighting in the eating area, etc etc.
Some (well, one maybe) restaurants near me are like this but it is uncommon. Ram's Horn comes to mind.
I don't go to restaurants anymore. Too much pressure.
I used to work in PoS industry.
This tech is new-ish to the US but not to the rest of the first-world. 15 years ago, paying with a CC @ the table was common in Europe, but the terminal could ONLY do payments. The devices that have been rolling out to the US are more like android tablets in that they can run the order taking half of it, too. Selling hardware to a restaurant is tricky and "oh, no, this only allows you to move the payment portion to the table; staff still have to go to central spot to find a table that can accommodate guests and place their order" was basically a non-starter. The sales pitch is a lot easier now that everything can be done table-side.