Google have just updated the Music subsection of their Google Play store, and now incudes some "experimental" controls that include a toggle for using HTML5 rather than Flash for desktops, as well as a replacement of the "thumbs up/down" rating system with a five-star rating.
For Chrome users, the service can now provide desktop notifications. Google's new HTML5 feature for streaming audio works in all browsers that have support for MP3 file playing over HTML5, which include Safari, Chrome and Internet Explorer. Firefox and Opera don't make the cut, as they do not support HTML5 MP3 audio.
Right now, there are some limitations: an unpublished limit on the amount of daily streaming allowed per user, even if users are listening to their own music that they manually uploaded to Google. Google still imply that the service offers unlimited streaming.