The truth of the matter is that this singularity has likely already arrived. At this moment, there are myriad devices that fit in merely a pocket that would manage to quickly thwart any burgeoning horror writer’s attempt at killing off their adolescent cast. The only way out of this little plot problem is the introduction of technological failure (that is, some magic force that prevents communication from functioning correctly for the sake of story, effectively creating an artistic sandbox). This is becoming harder and harder to reconcile as an audience.
How can any member of the modernized world take these threats seriously? There are so many platforms for instant communication, and so many devices that provide near perfect geo-location, that the pill becomes too unbearable (and honestly, offensive) to swallow. From this point forward, freedom is just a tweet away, whether writers are willing to accept it or not.
UPDATE (2/15/2010): A tangential mention of the ramification of technology on plot (different from the examples above, as it points out the lazy application of technology as conduit to magic plot advancement, instead of reinforcement).
"We seek on the Internet because that’s where we find. In the tween movie Twilight, heroine Bella discovers that her boyfriend Edward is a vampire by consulting a website with a convenient link to supernatural occurrences in her very own tiny town. The Internet is here collectively written, but perfectly tailored to exactly her individual needs. It is not the wizened woman in the house down the road that holds the truth to Edward’s identity, but an anonymous and multiply sourced repository of lore. A silent film would have cut to an intertitle to explain a secret; a Thirties noir would have spun newspaper headlines in circles to leap forward in time; a Seventies sci-fi flick would have introduced a wacky professor or scientist to deliver a piece of arcana. Today a quick cut to Google delivers the missing link. It advances the plot." Christine Smallwood at The BafflerIs this the role technology should play in narrative?