Microsoft could easily subsidize these to compete with the carriers, as they would be running via BING (producing them revenue in ad clicks). Also with regards

Microsoft could easily subsidize these to compete with the carriers, as they would be running via BING (producing them revenue in ad clicks). Also with regards to the Wifi issues obviously, the networks would have to be improved with regards to WIFI offered by companies and Microsoft would have to most likely invest into improving the network as well but, with billions lying around. It is worthwhile to go BIG on a market where it has huge potential than trying to milk its dying cash cows forever, until the company completely burns out.