(LOL at MaryZed reaction).
I have no children, but from comments by my neighbours, know that homework is now being expected via computer from start of secondary school, and would also laugh loudly at the idea you could get a 16yo to be limited to 2 hours a day.
Yes, there needs to be a bit more concentration on the world around us (how many people do you see looking/ typing on their mobile while walking along, unaware of what's happening in the traffic {or the location of/ behaviour of/ risks to/ their own children} but the world has changed significantly since I was in my 20s...
As I have worn glasses nearly all my life, I'm not likely to go for Google Glass (where a small screen may be viewed in a pair of "glasses") but unless, as CelineMcBean wrote, it's clear about the researcher's opinions, it's difficult to consider whether the person "has an agenda" or genuine concerns (with evidence to back them up)...
I laugh, with MaryZed, about the chances, and consider access to the internet more beneficial than dangerous (so long as there is discussion over "good" and "bad" content, and some initial parental oversight).
Just as some would "read" their encyclopedia to learn (and how many families even have a set these days), but most used them for reference, there are excellent resources online, and not just rubbish on TV, though clearly, one needs some guidance as to not accepting as "fact" everything which is presented/ found online.
Unless the researcher has good evidence against it, then 2 hours might be more appropriate at 10-12 (if computer / phone / TV are combined into that limit).