We have already seen many rumors about the update of Windows Phone 8 devices to Windows Phone 10, but now we have something really solid to prove the point. Answering to @_Y06_ on Twitter, Microsoft confirmed that all the current Windows Phone 8 devices will be upgradable to Windows Phone 10 in coming months.
@_Y06_ There will be Windows 10 upgrades for all Lumia Windows Phone 8 devices :) And we will release new Windows 10 models in the future!We should caution that technically speaking, Microsoft's Twitter account is not necessarily their press channel, but it is rather official. Still, we are currently not aware of any technological limitations as to why current phones could not be updated, reaffirming the @Lumia tweet.
— Lumia (@lumia) November 11, 2014
Of course its not official until it happens, and we must remember previous supposedly official tweets saying Windows Phone 7 handsets will be upgraded to Windows Phone 8, but so far we are pretty confident this prediction will come true.