Restaurants aren't going to bother with portable readers. Why should they? Almost no chip enabled cards require a PIN anyway (even debit cards) and they can always just make those few people go to the back of the restaurant to enter it. Hell, they may get their merchant acquirers to disable PIN support altogether so those few customers don't even need to do that.
And because there's no portable readers they aren't going to bother with Apple Pay support via NFC either. Rather, it'll likely be something where you enter/scan a code into the restaurant's app and use Apple Pay within the app--if they bother to write one, that is.
That said, Chili's announced Apple Pay support recently so eventually you'll be able to use it there with the Ziosks at each of the tables.