The right to run ad-blockers, which would, in passing, enable content alteration like you suggest, would be something we'd actually have to fight for.
Most people wouldn't understand, and would be stuck in a world where they can no longer control what they see or hear, or how what they see or hear gets changed before their brain is allowed to perceive it.
There will be a person on the street corner crying out that the world isn't real... but only the people running hacks and filters will hear her.
I love those science fiction stories where everything is shiny and all the tech is amazing and just works. But, there's no future I can see that goes from here to there.
A VR porn version of deepfakes... this is already close enough to possible that I would be shocked if someone weren't already working on it.
The core plot of the game then assumed that once a critical percentage of people had these, it was a viable tool for criminal organizations to engage in massive campaigns of thought control and overthrow the governments of countries all over the world, essentially replacing states entirely.
They know it's not the truth, but for all intents and purposes, while wearing the magical eyeglasses it becomes the truth.
The rest of the book is hilarious and I fully recommend it.
They will quite literally see a fantasy world, with filters and augmented reality changing everything they perceive.
Deep fakes and 3D transforms will mean any horny people can see anyone they want to naked. Other people will be able to live in a complete Lord of the Rings fantasy world with dragons, magic, elves and orcs.