Shortly before Christmas, PowerShell 5.0 RTM was made available to all Windows versions down to Windows 7: http://blogs.msdn.com/b/powershell/archive/2015/12/16/windows-management-framework-wmf-5-0-rtm-is-now-available.aspx.
Unfortunately, there was a bug that reset the PSModulePath environment variable, so this download was revoked until the bug is fixed. You may check back the PowerShell team blog to see if it is available already.
The good news is though that PowerShell 5.0 will be available for all relevant Windows clients and servers.
Throughout this month, we'd like to point you to three awesome community-driven global PowerShell events taking place this year:
Europe: April 20-22: 3-day PowerShell Conference EU in Hannover, Germany, with more than 30+ speakers including Jeffrey Snover and Bruce Payette, and 60+ sessions: www.psconf.eu.
Asia: October 21-22: 2-day PowerShell Conference Asia in Singapore. Watch latest announcements at www.psconf.asia
North America: April 4-6: 3-day PowerShell and DevOps Global Summit in Bellevue, WA, USA with 20+ speakers including many PowerShell Team members: https://eventloom.com/event/home/PSNA16
All events have limited seats available so you may want to register early.