I would say we're beyond the era of PC referencing the classic "x86 IBM Personal Computer compatible" definition. PC could reasonably be considered to include many ARM systems, considering there are now Windows laptops shipping with ARM processors that can run "PC" software. Besides, most new x86 PCs aren't IBM PC compatible anyways as legacy BIOS support has been dropped by a lot of UEFI implementations. I would consider any device that runs a desktop style OS (be it Windows, Linux, or even MacOS) a PC. The distinction in my mind is specifically mobile vs. desktop. Android and iOS are not PC. They're primarily touch driven and apps are restricted to a certain format with a centralized app store where you are expected to get all of your apps. Windows/Linux/MacOS are primarily keyboard and mouse driven and you have a lot more flexibility on acquiring new apps, with their forms of "sideloading" and "rooting/jailbreaking" being things that are just normal and accepted rather than workarounds/hacks to break out of the walled garden. I would also go as far as saying a smartphone can be a PC if you have a PC like OS on it, such as mobile Linux OSes that let you run desktop applications.
I would say we're beyond the era of PC referencing the classic "x86 IBM Personal Computer compatible" definition. PC could reasonably be considered to include many ARM systems, considering there are now Windows laptops shipping with ARM processors that can run "PC" software. Besides, most new x86 PCs aren't IBM PC compatible anyways as legacy BIOS support has been dropped by a lot of UEFI implementations. I would consider any device that runs a desktop style OS (be it Windows, Linux, or even MacOS) a PC. The distinction in my mind is specifically mobile vs. desktop. Android and iOS are not PC. They're primarily touch driven and apps are restricted to a certain format with a centralized app store where you are expected to get all of your apps. Windows/Linux/MacOS are primarily keyboard and mouse driven and you have a lot more flexibility on acquiring new apps, with their forms of "sideloading" and "rooting/jailbreaking" being things that are just normal and accepted rather than workarounds/hacks to break out of the walled garden. I would also go as far as saying a smartphone can be a PC if you have a PC like OS on it, such as mobile Linux OSes that let you run desktop applications.