Why is this big news? I am not in Qualcomm now and don't have any knowledge of pricing. However, even on working with the numbers from a best case pov, SpaceX needs 80,000 terrestrial base stations. Qualcomm proposes to make their Dragonwing platform as the "CSM" (anyone remembers that one - a few VP's kept that boondoggle going on for decades?).
Let's say one terrestrial station needs 3 Dragonwing modems/devices. So, for US alone it is a 300,000 TAM. Let's say each Dragonwing is priced at $10k. That is only a $3 billion in revenue spread over who knows how many quarters? Look at the revenue lost from Apple. Look at the revenue that is going to be lost from dwindling Samsung orders.