If you were to look through some of the older publications of the Magic world you will see similar fears discussed and thus far, movies, TV, the Radio... none of it has destroyed magic... it was just changed and modified so as to "fit"
Yes, much of the new technology that's coming out could make things more challenging but I can assure you, it won't kill the craft. A prime example of this is the show "Le Grande David" which has been running for over twenty years now. Everything in the show deals with magic from the late 19th and early 20th century and nearly every performance comes with a full house... and we're talking about a major theater (owned by the producers of the show).
Yes, some of the technology brings to us the challenge of proving that it is NOT what we are employing (even though there are times that this is exactly what we are doing

). The thing is, this is a false fear and we are running when not being chased.
Sure, technology such as the new cloaking fabrics and contact lenses that give you full internet access or the new cellular technology that can be built into your own mouth and mandible (mic in a tooth with receiver mounted in the base of your skull -- now being developed for the military), However, these are not things that will hurt our craft so long as we continue to strive towards adaptation in the same manner our predecessors did.
It's not something we need to worry about in that most of the really cool stuff is 15+ years before it becomes a matter of common accessibility.