Windows 10 Concept: Microsoft Lumia 940

Yes qualcomm is definitely still the largest chip maker and will have no problem in the near or distant future lol.
Maybe, it may no remain for a long time as Qualcomm has rumours of splitting and spinning it's Processors business due to their failure of Snapdragon 810 processors as a result of their rush move.
 
Highly doubt that. With how big and successful they are even despite the 810 issue which is still being put in phones(lol).