AA adding suites with sliding doors - is this the new standard?

American is finally catching up and adding new business class suites with sliding doors on some of their long-haul jets. Took 'em long enough. Everyone else has been moving this way, and AA’s older premium cabins were starting to feel super tired. I’m all for the added privacy — but I just hope they don’t slap a sky-high mileage premium on these when they roll out.