This article, from Quartz, is actually called “What I learned from researching almost every single smart watch that has been rumored or announced” and it is not about what you would think – it’s about the unspoken holy grail of portable consumer electronics. Battery power. There is chart at the link showing how battery capacity has increased since 1990 vs. how wireless transfer speed, CPU speed, and other technologies have progressed over the same period of time. Battery life extension technology has gone almost nowhere while capacity for everything else tech continues to get better and better. The limit of capability, in more and more cases, will be how long a battery will last.
Workplace Learning in the Digital Age 