https://arstechnica.com/gadgets/2018/05/with-timeline-and-your-phone-microsoft-makes-a-pc-the-phones-second-screen/

SEATTLE—The PC is, for many of us, no longer the central hub for our digital and online activities; the phone has taken that role. In this new world, the relationship between the two has flipped: the phone is not a companion device for the PC, but rather, the PC is now a companion device for the phone.