To Intel, defense that's why they are trying to branch out in mobile, IOT, automotive, AI. Intel knows the PC/server market is no longer growing.
The problem is that where they are trying to branch into is typically a much lower margin business where Intel isn't accustomed to playing. Automotive has much fatter margins, but once an OEM selects a supplier, they rarely change to a new supplier, so Intel is going to have a very tough time trying to unseat the incumbents already there.
Qualcomm is doing the opposite. They are are trying to push into the personal computing space by putting arm based snapdragon 835 into laptops etc. While the margins on that will be lower than traditional PC processors, it will still be fatter margins that it's use to see in mobile.
So on one hand you have Qualcomm trying to eat into Intel's computing business and you have Intel trying to eat into qualcomm's mobile/IOT business.
The question will be if Intel's market share loss in PC with traditionally higher margins can be made up with a heck of a lot more volume in the much lower margin IOT/mobile space.