If Glass takes off and especially if it runs Android we can except Samsung and other major players in the cell phone market to start offering their versions soon enough. With Android phones it didn't take long for Chinese manufacturers to start offering phones under their own brands for a fraction of what major manufacturers ask for their products [1] shipped directly from China to the customer. If a technological difficulty doesn't prevent Glass clones from being manufactured then given its high starting price of around $1500 (I wouldn't expect retail price to differ too much; cf. $529.99 for Google Nexus One at launch in the US) Chinese-brand AR glasses might become the next big thing around the world.
[1] See http://www.gizchina.com/2012/11/20/gizchina-exclusive-jiayu-... for what they offer for $200 unlocked. In, e.g., parts of Europe where pay-as-you-go is the norm and most phones are bought unsubsidized such prices are basically unheard for a similarly specced phone. Of course, those phones have their own problems (like worse QA) and come with little to no support. Despite that I personally know many technical types who have decided it to be worth it for themselves and sites like XDA Developers (http://forum.xda-developers.com) show a global interest.
[1] See http://www.gizchina.com/2012/11/20/gizchina-exclusive-jiayu-... for what they offer for $200 unlocked. In, e.g., parts of Europe where pay-as-you-go is the norm and most phones are bought unsubsidized such prices are basically unheard for a similarly specced phone. Of course, those phones have their own problems (like worse QA) and come with little to no support. Despite that I personally know many technical types who have decided it to be worth it for themselves and sites like XDA Developers (http://forum.xda-developers.com) show a global interest.
Edit: expanded the footnote.