Again you're comparing to what intel has for their consumer/business roadmap but nothing about what they are working on with MS. And again if they get it down to 10nm it will consume way less power, be more efficient with heat dissipation and allow for more gpu execution units. And of course their power management capabilities are enhancing as well. Together with windows 10 they could pull it off. The goal is to use what is needed at the time. I think one of the issues with 950xl is that it doesn't manage the cpu properly and the battery must get eaten up. Of course the firmware update shows that it can help in these areas. My 950xl never really gets warm, but when I was below 25% and in battery saver mode all of a sudden it was getting warm. That seemed odd to me as I would expect the opposite.
So a phone that is coming in what is speculated to be september of 2016 could indeed have some new chip that is announced along with it. Both MS and Intel have been pumping R&D into this area.
And it's not that they will shoot themselves in the foot. I think they will continue offering cheaper arm based phones. There's speculation of one with an SD820 coming out. This will be a new line that will do for phones what surface did for laptops. Surface pro wasn't exactly cheap when it came out. Neither is the surface book. If they pull it off they could be selling another 2-in-1 but this time it's a phone.
And the GPU is going to be a big factor as well as you want to be able to run cross device anything you buy in the windows store. Pumping out arm code for an app via visual studio is simple. you check that you want it to be compiled for arm devices, but when you're creating optimized code for GPU's, it becomes more of a hassle. So if you could remove that hassle you are going to see quite a spectacular ecosystem.
Not only that, MS could also be working on some new battery tech. This is an area that should get plenty of R&D.
In the lab researchers were able to convert heat dissipated from a cpu back into energy. Imagine being able to charge your battery or direct that energy somewhere. That would enhance the longitivity quite a bit.
I can assure you that MS will not release anything ATOM based on their next phone. This is a phone that needs to create a wow factor and the atom chip just will not do that. They could have already used the best Atom chip out there but didn't. And it's not because of app compatibility as it's a layer that software could easily take care of.
I predicted the whole concept of phones turning to PC's years ago before the 2-in-1 hybrids even came out. It was easy to see because everyone always has their phone with them. It's attached to them, the one device they bring everywhere. So you need to make that one device be as versatile as you can. And well continuum seems like the first step. My friend laughed me off back then saying it wouldn't happen. Well it's happening.
Even google is seeing the benefit of such an ecosystem that is deviceless or lets you do everything in one area. They are even creating a new OS. Hope MS can maintain a commanding lead and get stuff done quick enough. Google is pretty quick when it comes to releasing things.
Tech is doing some crazy stuff now. Heck look at Project Tango from Google. It uses Radar to map out your environment in full 3d. This allows gestures and everything you can think of. Interesting but somewhat scary. If every android phone had one you could map out a big portion of the world even the inside of your home. My guess is that they will also use this data for their mapping services etc.. All part of their plan to command the future of mapping. Right now bing has become much better as a mapping service, especially things like bird eye view, traffic cameras, although streetview suffers. But Google is looking more into the future.
Anyways, I guarantee you it won't be an Atom chip.
Roadmaps are for investors and consumers for plans on existing solutions. Anything secret is usually shelved and revealed for a wow factor. So whatever MS has baking, it should command a wow factor like the surfacebook did.
That's why I love directX 12. It shows its power with the surfacebook. It will use gpu cycles from any chips available without any need for sli configurations. And it will do it without developer intervention.