Skyrim is the first game ES game I've played so I don't know how Bethesda works this...

Will we be hearing news about the development of the sixth instalment now?

I played about 5 hours of Fallout 3, I liked it but nowhere near as much as Skyrim.

If there is another TES Game, we likely won't hear about for another 3 or 4 years.

You can speculate about future TES games here: http://www.gamesas.com/topic/1540762-official-beyond-skyrim-tes-vi-66/