Look, I'm all excited over the incoming cyberpunk dystopia but no they won't be able to do this. They still have posted menu prices and folks will be pissed if prices ever go up from what they're expecting to pay.
There are also already restaurants that have different prices when you use their app which helps condition you to accept that prices will differ from person to person or even day to day.
You're right that people don't care for discriminatory pricing though. People's objection to the practice is the only thing that's been keeping it from being more widely used already (https://link.springer.com/article/10.1057/s41272-019-00224-3)
They stand to make money hand over fist from it though so we're going to see company after company testing it, pushing the boundaries of what we'll accept and normalizing the practice. Without regulations making discriminatory pricing illegal in certain settings, it's basically inevitable that we'll see it more often.
But the reverse of raising prices beyond menu price depending on who you are will get pitchforks.
https://kioskindustry.org/mcdonalds-kiosk-counterless/
Not sure how much of a trend this is though.