I think at every workplace, where PCs aren't the main thing workers interact with while working, but rather only assist them, tablets will eventually replace PC

I think at every workplace, where PCs aren't the main thing workers interact with while working, but rather only assist them, tablets will eventually replace PCs (for example hospitals, schools, workshops or retail). But if the work consists of mainly interacting with a PC, tablets are by design inferior and won't replace the PC.