No they’ve used them on other sets, although I think primarily on sets targeted towards girls (this frozen set for example https://www.lego.com/en-us/product/elsa-s-ice-palace-43244)
Not sure if this set would be an indication that they are looking to use the more broadly.
I think the argument is that as less people have desktops and laptops, the only people left will be more technical (otherwise they’d just use a phone or tablet). The more technical people are also likely to use Linux. So as non-technical people move to tablets and phones, technical people make up a larger share of laptop/desktop users.