My experience of watching kids (ranging from 3 to 15 years old) use this stuff is, in order of level of use/desire to own: Smartphones, tablets, <moderately large gap>, PCs/laptops. As a proportion of use, parents are more likely to use a PC/laptop than kids.

For kids, their default go to device isn't the PC. That's what they use when they have to do something which isn't great on a tablet.

The other interesting thing is what they think "isn't great on a tablet". Non-professional photo or video editing - if you're a 15 year old today, that's a tablet thing, not a PC thing. A lot of gaming is phone/tablet rather than a PC.

A PC looks to me to be primarily homework using something MS Office-ish.