Google Glass may not be available through the Explorer program anymore, but Google Glass is potentially already underway into the next phase of its journey under the leadership of Nest CEO Tony Fadell, who had stated he wanted to redesign Google Glass from the ground up. While Glass could likely be a ways off still before we see it available to consumers in whatever new design Fadell cooks up, it seems Fadell and the team at Google Glass are already sending out very early iterations of the next Google Glass version to partners. This is of course a rumor, from unnamed sources, but it isn't completely unbelievable for Google to want to get some real world testing done, albeit from a trusted group of partners as opposed to individuals who buy into the beta like with the Explorer Edition.
According to 9 To 5 Google, Google is showing off early versions of Glass to its Glass at Work partners, keep in mind that the mentioned devices are prototypes and not anything near a final revision of what's to be expected when and if Google launches these in the future. Google has been reported to have begun showing off prototypes since October of last year with at least one company being shown a prototype so far in 2015. Also worth mentioning is that there are mentions of Google Glass having some new members on the team since the leadership alteration, so they could already have something in the works for the new design moving forward, although it's also possible these prototypes could still look and function much like the Explorer Edition Glass units we already know.
While there is nothing to support this officially and publicly yet, if Google Glass has some new team members and they are already working on early version of the next Google Glass, it somewhat lines up with Fadell's vision for the redesign, however if there is an early prototype in the works. as we stated above it is likely far off from being anything final. If Google is already privately testing the beginnings of the next Google Glass, it could give them a better ending result with a model that could end up more consumer and socially acceptable should they have enough testing time.