That seems rather arbitrary. I'm not doing any general computing on my iPhone, I'm just browsing Hacker News and watching YouTube. If your contention is that the phone is capable of doing more than those two things, well, isn't the Xbox capable of doing more than just gaming?
You're not. The majority of phone users replaced their computers with a phone. They are using their phone for everything they used to use their computers for. Almost no one is using an XBox to replace their computer.
Are you pushing back on the word "majority" or on the concept that many people use their phones for nearly everything they used to use their computers for but that next to no one does the same with an Xbox?
That's nothing to do with it. The judgment repeatedly talks about Epic as a competing game store. I'm not sure how else you'd describe the app store of consoles.