Comment Re: I'd go further (Score 2) 79
Windows actually is a registered trademark for Microsoft. However, it's a registered trademark specifically in relation to computing and technology. Bear in mind that a trademark isn't granted on *any* use of the term, but with respect to specific industries (which was the bone of contention with the term "Apple" when Apple moved into the music distribution business and tried to throw its weight around in that industry). If Microsoft wanted to start up in the business of glazing - even say smart glazing - they'd have trouble asserting their Windows trademark in that area.
The problem with "Spectacles" isn't just that it's a word in common(ish) usage in English, it's that it's a common word relating to watch Snap are selling: eyewear.