That was google glasses problem though, they didn't focus enough on productivity. It was a gimmick. Instead of handing it out to techies to play with, they should have made one single useful application, like for doctors or architects, and then only rolled it out to them. Instead of "glassholes" you'd have respected professionals who would come to rely on it for work. More and more applications would be added, and eventually people would use it for gaming and entertainment and daily life. Like, for example, cell phones. And the internet. They both started for productivity purposes and became much more.

And anything that increases productivity will always have plenty of money thrown at it. Think about standing desks, for example. My employer is happy to drop $3,000 on a high end laptop so I can be that much more productive.