Microsoft names its next Windows 10 upgrade: '2004'
Microsoft this week tagged the next Windows 10 refresh with the four-digit label 2004, the designation meant to avoid confusion with a long-retired server OS if not an admission of the upgrade's release timeline.
Windows 10 2004 - in Microsoft's format, the numbers represent year (yy) and month (mm) of release - is still in testing but will be 2020's first feature upgrade. Until the Nov. 26 issue of the latest beta build, Microsoft had been calling the upcoming upgrade 20H1, as in 2020's first-half release. (It's unclear why Microsoft continues to identify in-beta releases with yyH1 and yyH2 when it always switches to the yymm scheme later.)