FUTURE! What do you think now and tomorrow is? You are right about "no hurry" and if that is their mentality it won't enough to sustain the platform, and that IS the truth.
They don't care what you think future is, don't even care if you think it's not the right move or simply move on . I bought Microsoft stock shortly after owning the Lumia 920, it was like 29$ or something... Nowadays, it has hit 60+ and momentum for them to keep going up. So clearly none of the mobile stuff is important to their bottom line.
Mobile is an important strategy for them sure but other things are making the money so they're going to grow those things first. Mobile is a toy side project for them. They have no need for it to make them anything now and they have time to figure out how they want to re-enter the mobile market. Just sucks for those of us that would like to see more frequent phone releases and buzz.
It's kinda funny, them keeping silent about it and just moving on actually builds confidence in the platform for me cause I've seen them talk about it forever, put bits and pieces of it together, come up with one windows for all devices and it's pretty cool having my SP3 and S3, phones (920, 930, 950XL) all coming together under a pretty common windows10 platform. The platform is really healthy when you look at the big picture.
It's clear now that windows10 can work on all sorts of size screens, it's figuring out what windows10 can do to for each screen type. They ruled the ultra portable 2 in 1, they did the huge surface hub, going holographic AR and/or VR ... All in one PC... what's next... dunno. It's been said here many times that they want OEMs to do the traditional phone and looks like they will come back when they feel they've got something to show.
The platform is sustaining itself just fine with all the other things in their portfolio.