I don't see Sweden leading in tech so much as being 'tech progressive'.

Sweden is ahead in some things related to tech, particularly their own version of startups. Spotify remember, is related to the fact that Sweden is a pop-music powerhouse - there is definitely industry synergy there.

They are generally well organized for a small country, they make Jet Fighters (quite a feat) which is also related to the fact they are a few degrees more 'sovereign' in that they are not part of NATO and have historical antagonisms with a much bigger power, Russia. They had one of the world's largest air forces back when individual fighters were only the price of a few cars.

Those synergies resonate with one another but I don't think it's in silicon.