I flew Delta about 6 months ago and they had something similar, also for free, but they use Viasat. I think most of the big airlines were moving this way anyway to be honest, Starlink just has a good opportunity for advertising.
Gate to gate (if the plane door is closed) wifi has been a thing for most (all?) of the US airlines for awhile. Delta's wifi is ok, but I routinely have issues. It could be a combination of older technology on the plane and worse satellite network, but it's supposedly nowhere near as good as plane with Starlink.
I also use Starlink at my house in Italy. I'm in a decent sized town, but there is no fiber available. It has worked great, and more importantly took about 10 minutes to setup.
I believe Viasat internet satellites are placed in geostationary orbit, whereas SpaceX Starlink is not, so the service Viasat provides is already blown out.
