I had this conversation with DD and DH just this week. DD went into High School this Sep. She has homework every day from various lessons, at least one (and usually 2) per day needs to be completed online.
Not an issue for us, we have a home PC and printer and can afford to bit DD a laptop for Xmas.
However I can well believe there are children for which this will be impossible:
Our town doesn't have a library or Internet cafe etc.
The poorest area is also the one with the worst internet connectivity.
The school homework room is open from 3:15 to 5, but only has 20 PCs and you have to pay for copies/prints. There are 1500 students in the school.
The poorest area uses a school bus that leaves at 3:30 sharp - there is no direct bus service after that (although there is one that takes you into the next town 5 miles away from which they could catch another bus back home).
The online homework platform isn't compatible with phones/tablets.
As for buying a laptop and paying for internet - At her 'poorest' DNeice was surviving on £62 a week for her and her DD. Paying out a fiver for internet is hard enough, let alone forking out for laptop/printer/printing ink/datastick.