Fallout 4?

For five years now the world has been waiting for any sign of the next game in the Fallout series.  In 2010  there was hope, Fallout New Vegas.  But three years have past now and we demand more.  In 2011 Bethesda, the creatures of Fallout 3 and the Elder Scrolls series, released Skyrim, the fifth in the Elder Scrolls series.  However it failed to live up to the hype since the previous Elder Scrolls game Oblivion was consider to be one of the best role playing games of all time.  But there has been no sign of any Fallout 4 content and we must ask you, Bethesda.  How much longer must we live in darkness and when will we get any word of Fallout 4?