Good news for all Lumia with Windows Phone 8 users! Microsoft has confirmed that all Lumias running Windows Phone 8 (and of course 8.1) will receive the Windows 10 update. Windows 10 is the new universal OS update for computers, tablets, phones, wearables and others. However, not any details of the update for Windows Phone have been unveiled.
@_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!
— Lumia (@lumia) November 11, 2014
We have been worrying for the availability of the update for current Lumia phones as Microsoft had a bad record in the past. In the transition from Windows Phone 7 to Windows Phone 8, the kernel had been changed so older devices are not compatible with the new update. You can imagine how upset the users will be when the phones are left forgotten. So it is great considering older devices like Lumia 920 will be getting the update too even though it will be more than 2 years old when Windows 10 is available.
Of course, they did not share the time frame for the update as it is not officially launched yet. It will be available sometime in 2015 and Microsoft promises that new devices will be coming along. For other OEMs like HTC and Samsung, there is not word from them yet and we can only hope for the best.
Source: Windows Central