Reporting, here, here, and earlier in December 2015, here.
Two page court item from last December, here.
57 page opinion of the court on appeal, online here. Partial cooncurrence/dissent begins at p.46 of 57 pages.
Utah AG posting after oral argument, dated March 8, 2016, here.
Whether the case ends with the issuance of the preliminary injunction, or is litigated further, is unclear from reporting. The decision of whether to contest things further rests with the defense. They can throw in the towel.