Did not stop Gopro. If you have been to a ski resort in recent years you have probably noticed that at some point, Gopro saturation started to become inversely proportional to riding skill. Where Gopros are sold with the promise of being like those who get really fast and have spectacularly high jumps, Snapchat specs will be sold with the promise of being like those who get really drunk and have spectacularly great parties. That is a very promising market to tap into, but no way that it could ever be a four billion market.

There are important differences between GoPros and Spectacles, though.

GoPros are a convenient, high-quality, expandable memory camera that creates a regular video file as big as the storage space available that you can use however you want.

Spectacles are a convenient, unknown quality camera creating a ten-second video that requires smartphone interaction, is designed to be on your face, and is tied to one specific (albeit popular) platform.

Aside from both being able to take video and being easy enough to carry around, the products and the target markets don't intersect perfectly, so it's hard to predict one's success from the other.

I base my comparison on the observation that both are purpose built for capturing a very specific kind of experience that few have, but many think they should have (but never will).

This is certainly no predictor of absolute success, just an element of understanding the potential market.

But they do all seem to have $500+ phones already. I don't think it's a stretch to assume that they could afford the glasses if they deem it worth it.