When Apple yanks apps from the store, they are not remotely deleted from customer's iDevices or PC's. There are a small handful of cases where remote deletion was used, and IIRC, it was all various forms of malware.
As far as I'm aware, patent cases usually end in injunctions and fines. I'm not aware of any case where the infringing party had to go out into the world and round up all the products they sold. While the internet may make that easier for Apple, I still think it would be an extraordinary thing for a court to order. The court does not have the authority to give such commands.
As far as I know Apple has yet to use its ability to pull apps from devices. Apple said it only will do it when malware appears and that has not yet happened.
When Apple yanks apps from the store, they are not remotely deleted from customer's iDevices or PC's. There are a small handful of cases where remote deletion was used, and IIRC, it was all various forms of malware.