Threshold 2 (10586)... what does it mean?

Wrong. Threshold 2 stays as is, it means new more functions plus the usual monthly patch
Sp1 will be REDSTONE, next summer, and maybe the name will be Windows 10.1
Threshold ONE was Windows 10 RTM itself at the first release in July 29th.

And it's ONLY for DESKTOPS. Not for mobile

...I said good day sir! ��
 

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