Wrong, everyone else is following Apple. WSJ announced THREE YEARS ago that Apple was working on a wearable and everyone tried to rush manufacturer their own.
Wearables date back to at least the 1980s. But as far as the current crop,
everyone was already working on wearables by 2011. Some were simply further ahead towards production than others.
Samsung and LG had put out touch based smartwatch/phones in 2009. Sony-Ericsson has LiveView in 2010. Motorola had Motoactv in 2011. Sony had their own SmartWatch series in 2012-13. Samsung brought out their first Gear watch in 2013. And of course Android Wear was ready in mid 2014.
Apple is the last major company to produce a smartwatch from their R&D, and yet they still brought nothing radically new to the table.
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Moreover, back in 2012 it was commonly viewed that it was the extraordinary success of the Pebble Kickstarter project, that had jump started widespread public interest in smartwatches. E.g.
The mobile watch revolution is here, thanks to Pebble - April 2012
So when the later 2013 WSJ/NYT articles mentioned a possible Apple watch, that was NOT the start of all the other wearable projects, but only the start of their public exposure. (For example, it was later revealed that in the summer of 2012, Google had quietly bought up WiMM Labs and their late 2011 Android based smartwatch.)
-- The upshot:
Did the knowledge that Apple might release in 2014 push others to release their products earlier than they might've? That could be. But it didn't start their wearable projects, because they were already well in progress.
For that matter, it looks now like Apple ALSO released earlier than they wanted. Without all the competition, they probably would've waited until they could include the health sensors that they originally wanted.