I have a considerable amount of evidence to suggest that in the USA and the EU, a lot of people did not use their PCs, or know how to use them.
The smartphone world has a couple of rules:
#1: follow the pack
#2: know very little
Technology adoption seems to be about "critical mass". It doesn't surprise me that different nationalities take to different technologies. This is not because there is any reasonable premise behind it which is related to the particular technology, it's simply down to who achieves a critical mass of users for the majority to follow within that cultural environment.
I would even say that with China compared to "the west", China sees itself as a place rushing into a future that will be completely different to today.
In the West, we are largely ruled by "conservatives".
What stops any one of a thousand technologies taking off? Conservative & luddite attitudes. With the huge majority being the users. User adoption is the challenge. Often affluent 'busy' people have no time to even *think* about changing their habits. Hence almost nobody bought handheld PCs, but bought telephones (and complained like stink that they weren't obvious enough to use, and that they didn't like computer stuff).
In fact, in the west the entire computer industry and automation industry has been treated as a form of very threatening and destabilising presence by most of industry, and there is typically very little optimism about "the latest new thing".
We have a problem of "backwards compatibility". Lots of people, when it comes to computers, are basically "backwards". What is interesting about that phenomenon is that the European dogma of the 18th century seems to prevail, that europeans are quite automatically the world leader in technological advancement.
That has not been the case in the past, and it should not be assumed to be the case in the present.
Certainly I would argue that China did not have the dark ages, and that a good portion of the technology and philosophy that powered the industrial revolution originated in China.