It looks like behind Nadella's polite and softer manners MS hasn't lost at all its greed and lust for power and monopoly it had in Ballmer era. Our only hope is that excessive greed make it shot itself in the foot. Of the competing services, Steam is arguably the most closed (on PC, and if we exclude some publisher-specific services), but Valve can afford to try and bind its users in a far looser way than MS, as with Steam it just wants to make people use its gaming services and above all buy games through them, but it hasn't a hidden agenda of establishing an OS monopoly, that's what makes MS services different, its not so hidden agenda is so overwhelming, it's so obsessed with it, that it eventually leads it to make its services awful for gamers used to a more open environment and market.
