Nutanix have made Acropolis 4.5 generally available from October 15th 2015. Features for the latest realease include

• Cloud Connect for MS Azure (integrate Nutanix backup on prem with public cloud - now supports MS Azure)
• Erasure Coding (now GA in 4.5 - capacity optimisation solution called EC-X, reports it can reduce storage footprint by as much as 70%)
• Self-Service File Restore (tech preview)
• VM High Availability
• Ability to migrate workloads from ESXi to Acropolis (using Prism)

More details here

If you are not a Nutanix partner you can sign up and download the community edition to have a play start here