One of the most effective things about capitalism is that when new things replace old things, the new things are preferred by consumers over the things they replace.
This is an extremely good feature when talking about most consumer goods. Modern cups are just as good as old cups but way less expensive. Modern cars are significantly better in basically all ways (perhaps excepting repairability).
There may be a danger, however, when talking about technologies that people use, in part, to keep themselves from being bored - to absorb their attention in other words.
For me personally, Facebook/Internet/Computer Games >> TV >> Radio >> Books at capturing my attention. I suspect that this isn't a very unusual experience.
It may seem reasonable on its face to not let technological artifacts push you around or manipulate you, but honestly, it's not just a computer or a TV. Between TV, the Internet and Computer Games, it's the very best and most able of hundreds of thousands of people working every day to capture your attention.
Honestly, I have no idea if the current generation of attention capturing technology is dangerous. But I do know that what ever displaces what we have now will be better at capturing our attention. And the next generation will be better than that. And eventually, if the trend continues, there will be something that's so good at capturing attention that it is dangerous.