If you have any subscription for Microsoft Office 365, you have access to Power Map for Excel as part of the self-service business intelligence tools. Whenever any new Power Map features and performance enhancements are released, you'll get them as part of your subscription plan.
To learn about the Office 365 subscription plans, see Explore Office 365 ProPlus and Compare All Office 365 for Business Plans.
If you have Office 2013 Professional Plus or a standalone version of Excel 2013, you can download and use the Power Map Preview for Excel 2013 as an unsupported add-in. A new preview version that replaces the earlier preview is available on the Download Center page. The earlier version of the Power Map Preview is expired, and won't work with any version of Excel. If you have the earlier version, uninstall it from Control Panel, then download and install the current version of the Power Map Preview. This has the same functionality as the version of Power Map that was released with Office 365 SP1.
Although feature and performance enhancements for Power Map will continue to be released for the Office 365 subscription plans, there are currently no future plans to update the downloadable Power Map Preview.
Check the Power BI Blog to keep up to date on any new improvements and news about Power Map and other BI tools. To learn more about using Power Map, see Get started with Power Map.