As a reply to a curious twitter user, Microsoft replied as :
This a great news for Lumia owners actually. Luckily, Microsoft is providing all OS updates to even budget low power devices also. Windows 10 is a universal OS with unified store, sync and so much more. Recently, Microsoft released the Technical Preview for Windows 10 for users who wish to have a peek at the new OS before it hits the market. It offers great start menu with tiles in it, better high resolution support, native mkv support and so much more.
The Windows 10 major OS upgrade for Lumia devices may hit next year. This update will be the main update that will come after the Windows Phone 8.1 update which offers start screen wallpapers, action center, Cortana, file manager and many more.
Microsoft is now taking the lead after the acquiring of Nokia and with the Windows 10, they surely will get somewhere.
What are your thoughts on this?