I think it still is true in mobile, but in mobile the general computing components just need to be good enough not to lag, build quality and interface elements

I think it still is true in mobile, but in mobile the general computing components just need to be good enough not to lag, build quality and interface elements are the things to buy on with laptops, tablets and mobiles. Doesn't matter if you have a powerful gizmo if the hinges are broken and it overheats, however with PC's you can buy a high-end motherboard and find a power supply in a skip and just nail them to the wall if you like. Build quality is far more optional.