Yes is the short answer, myself included.
From the post:
The core issue is that GPS technology has been built into many crucial infrastructure applications, from transportation systems to power grids, and in many cases there is no fallback option should the GPS signals suddenly become unavailable. GPS has many advantages, but it is not particularly secure or robust in terms of interference, due to its relatively weak signal strength.
Case in point, the tizzy over LightSquared’s 4G LTE offering that, depending on whom you ask, could create GPS deadzones by creating interference on the weaker GPS frequency.
Ironically, I was just thinking today that turn-by-turn navigation in Google Maps on Android could be the killer feature when pitted against the competition.
After all, it allows you to do one more thing with your phone, and Google has recently upped the ante by adding real-time traffic re-routing.
I suppose this question is part of the broader one, i.e. are we too reliant on technology in general? Again, yes.