Regarding new Star Tours scenes, I would chalk that up to the dysfunction of the modern Disney company and specifically the absolute dearth of new Star Wars shows or movies that have been worth adding. When they have added new scenes it happened in multiple parks simultaneously and without any downtime to any of the rides, which is mainly the point I'm making: new "content" can be added entirely without downtime or physical construction, which are generally very costly in terms of both time and money.
I think another thing this sort of ride allows is for park operators to make smaller bets. A physical ride's lifespan is normally two decades, give or take a few years. With this you could have the physical ride in place and then change the content annually, for example every summer when a new Pixar film comes out you could already have the synergistic ride up and running since nothing physical needs to be changed. If you put out a movie about an ice princess that becomes more popular than you could have ever imagined then this ride system would let you get that movie into the parks in a matter of months, potentially, rather than years.
All that said, I actually don't see this at Europa Park, because I don't think it will be that great of an experience. Again this is all just guesswork but this seems like something Mack wants to sell to other parks where this kind of cheap and modular experience makes financial sense. I could maybe see it as a YULLBE-style upcharge but not as a full-on addition to EP.