My hypothesis is that: It could be the end (true), but maybe due to humans' actions, not due to global warming.
It was mentioned that electronics will malfunction and the whole World's virtual system goes chaotic. Some humans make full use of these to pull off big scams and stuffs - which may results in theft, forgery, etc..
For example when the ATM goes dead, robbers just try to loot all the cash - I mean, who wouldn't do it right? CCTV will not work during the break, the bank wouldn't be able to stop from the many looters and police can't contain the situation. Eventually both side will clash, riots happens, the whole economy and governance system would crumble, this even made more possible since this geophysical activity will last for months or even years.
Many countries will suffer, some worse than the other - this would then trigger off as an opportunity for countries striving for World recognition (Iran or North Korea perhaps?) to wage war with USA or Israel. Every countries will want to settle their own disputes too. And of course leads to World War III, eventually.
This whole thing might be too far-fetched or rather too way off to sound like a hypothesis, but its a simple chain reaction really, like a domino effect - this however, triggering an even worse event each time.