>and the LG big screen ad board showed an LG G3 ad which would have first appeared around the time of the G3's launch in OCT 2014
The LG ad was for the G2, which launched in Sept 2013, looks like the ad was still running in May 2014. So it appears we are still in our late 2013 - early 2014. Interestingly the G3 did launch in Korea in May 2014, so I doubt that there would be ads for the G2 running much later the May 2014.
https://en.wikipedia.org/wiki/LG_G2
https://en.wikipedia.org/wiki/LG_G3