Actually here in Finland a lot of schools are moving towards laptops/tablets/etc. Kids as young as 9-10 are expected to use those devices. Books and materials are provided through online portals and downloaded locally on the machines. A lot of homework is done and returned online. Along with exams, essays and all kinds of other nonsense.
As you get older most exams are done on Linux distro called DigabiOS (https://github.com/digabi/digabi-os) the same distro is also used for the matriculation exams. You boot this off of a USB drive and hope it works well with your own machine.
So I can absolutely see people spending most of their school day on a computer staring at a screen.
I recently rewatched Neon Genesis Evangelion and noticed that in many of the classroom scenes all of the kids had laptops. The anime aired in 1995/1996, but was set in 2015.
What school has their students be on laptops all day?!