This does presume alot. Mainly, that all areas have WiFi hotspots with known fixed GPS locations.
Is apple going to provide these hotspots or are they going to rely on the public to provide them? And if it's the public providing them, how do they ensure that the WiFi GPS locations are accurate to begin with?
Does this mean we can expect a major announcement of an indoor mapping application for the iphone 8, 9, X or 11? Or maybe it just might make version 7 in another apple mapping boon-doggle. Only time will tell.
This is a hedged bet that WIFI will become more prominent. When I visit my Dad in a little SoCal town, I purchase a weekend's worth of wifi from the towns built in wifi network. Not only does it enable me to get internet access at Pops, but I can take my device anywhere in town and access it. Presumably, someone believes that triangulation of wifi signals (which Android phones like to do) is subject to IP. Defensive or offensive?