This is already possible, until recently, my commute was 1.5 hours (each way) in which I would normally sleep or read, and occasionally watch TV. It wasn't a big deal, but I wouldn't have wanted to go much further, and there's no way I'd have gone twice that far.
It's still rare for people to commute that far on a daily basis. Everyone I know who travels more than about 2 hours from home to work tends to take weekday lodgings within walking distance of work.
A 3 hour commute will always be a big deal, because even if you work a strict 8 hour day, never staying late, that means that 14 hours out of 24 are spent away from home. If 8 of those remaining 10 are spent sleeping, you now have 2 hours left in which to indulge in any kind of leisure or childcare activity. Not everything can be done on the move - I can't imagine it being very likely that you'll be able to go for a swim or play rugby or cricket whilst travelling to and from work.
It's still rare for people to commute that far on a daily basis. Everyone I know who travels more than about 2 hours from home to work tends to take weekday lodgings within walking distance of work.
A 3 hour commute will always be a big deal, because even if you work a strict 8 hour day, never staying late, that means that 14 hours out of 24 are spent away from home. If 8 of those remaining 10 are spent sleeping, you now have 2 hours left in which to indulge in any kind of leisure or childcare activity. Not everything can be done on the move - I can't imagine it being very likely that you'll be able to go for a swim or play rugby or cricket whilst travelling to and from work.