"built on ARM Cortex technology" was announced last year with Qualcomm being the first customer. It's not architectural it's bellow that and only available to lead partners. ARM itself creates a "slightly" custom core.
Can't quickly find a better link so this will have to do http://www.anandtech.com/show/10366/arm-built-on-cortex-license
Your Qualcomm 835 article is very helpful, but I have a very different take on the gigabit cell site possibilities. That will often, probably almost always, deliver 100's of megabits to anyone with a robust connection, 2-4 times what most networks support today. It also means that everyone will get higher and more reliable speeds everywhere in the cell. It's not a cure-all, but should make a major difference.
Agreed, few networks are ready to support the gig but that should rapidly change. bit.ly/BigGigLTE Telstra and SK are ready, Sprint and T-Mobile vying to be the first in the U.S. http://bit.ly/STMOgig Over the next 6-24 months, I predict wide deployment.
You've missed it but they use that new type of ARM license,"built on ARM Cortex technology" so it's a slightly custom A73 or A72 and this is what enables more cores ,better perf,,higher efficiency.
However, the clocks are rather low and likely everybody will beat them in CPU perf. Not Apple though since computing hasn't been about single threaded performance for a long while. In GPU Samsung might beat them in perf.
Windows on ARM is interesting but this is not the right silicon to make an impact. Low perf in PC terms, priced at a premium since it's a high end mobile SoC, LTE adds to costs, no PC IO. Analysts must also consider that folks that can afford to pay for a PC with LTE, usually don't buy low end.