A home PC is useful for several reasons. It can be the one place where the family can gather to plan a trip and make bookings. Its also useful for online shopping or even just printing out homework and projects. Although its easy to browse on your phone, having a larger screen, comfortable place to sit and work on something is a great option!
The PC hardware for a home PC need not be very demanding. An APU like Ryzen 3400G or even 2400G which has inbuilt Rx Vega 11 graphics is good enough for mild gaming and running pretty much any kind of productivity apps like office and browsers.