Having been a TA at two universities in two different states, I can assure you that considering university students would increase the prevalence of small laptops & tablets, not decrease it. Although not literally true, it is perfectly true in the colloquial sense that everyone has them.

Restricting the sample to just the students I've taught (several hundred, probably less than a thousand), I'd view prediction 20 as mostly true in all but the most literal sense. (For instance, I find the difference between touch interfaces with fingers vs those with a stylus to be irrelevant to the spirit of overall truth of the prediction.)