As much as I want to joke that it is the year of the Linux desktop, I think it is mostly because the younger you are the less likely you are to have a pc (so Windows, Mac, Linux and BSD for the dozens of you).

As far as I can see most of the time people use their phone for everything and only touch a pc for work or if they have a hobby that requires the use of a pc (gaming, digital art, music, programming, etc…).

Well it does have a major impact, less cars -> less congestion -> less polution. But it has to work in tandem with other changes such as lowering driving speed increasing public transport network with emphasis on network, mandating tighter control on polution. You could say that the bicycle lanes are an indication of a change in attitude towards car only transportation.

Although it is good that they added riding bicycle lanes I doubt that is the only reason for the lowering of pollution.

Not only do we have electric and hybrid cars, due to euro standard combustion engines have become a lot cleaner during the same span of time. Plus public transport has also become a lot better during that time.