Windows and SQL Server reach the end of mainstream support in July 2019 (SQL) and January 2020 (Windows). Customers who want to continue to run 2008/2008 R2 workloads will have the option of purchasing Extended Security Updates from 1 March, 2019.
There’s a new FAQ from Microsoft which is useful, and if you don’t want to read all 57 questions then focus on question 9 (pricing details), 34 (options for hosted environments), and 37 (how these ESUs will be delivered).
Find this FAQ in the Core Infrastructure section of our Licensing Guides emporium: http://bit.ly/MSLicensingGuides, and add it to your weekend reading list.