Google Glass is becoming less exclusive as it heads into 2014, with at least some Google Play Music All Access subscribers able to get in on the action. Subscribers to Google's streaming music service are receiving invitations to purchase the high-tech specs for $1500 as part of the Glass Explorer program. Google began sending e-mails to All Access subscribers this morning, according to Android Central. Google Play Music All Access, an on-demand streaming music service similar to Spotify and Radio, costs $10 per month. It's unclear1 how many All Access subscribers will be able to purchase Google Glass. The e-mail is titled "Your Chance to Buy Google Glass," and it prompts users to sign up for an invitation.