A lot of the time you waste doing those things was already wasted. For instance I am posting this while waiting in a drive through for breakfast, but this is exactly when I would be playing random game if I was not posting here.
Edit: And well designed smartphone games (which is not all of them) load shockingly fast. I have actually played smartphone games while waiting for other slower games to load on my computer.
Also, since smartphone internet browsing is a bit uncomfortable, it might prevent you from booting up your computer as often and ending up spending an hour.
A lot of the time you waste doing those things was already wasted. For instance I am posting this while waiting in a drive through for breakfast, but this is exactly when I would be playing random game if I was not posting here.
Edit: And well designed smartphone games (which is not all of them) load shockingly fast. I have actually played smartphone games while waiting for other slower games to load on my computer.
Also, since smartphone internet browsing is a bit uncomfortable, it might prevent you from booting up your computer as often and ending up spending an hour.