It's widely held that we're currently in another 'Golden Age' of TV, with the sheer quantity of acclaimed television dramas still ongoing or recently completed making it nigh on impossible to keep up to date with all of them.
Typically in TV the writer is king, whilst the director reigns supreme in film- and the two have always been quite distinct. However, the boundaries seem to be narrowing, and the creative freedom, funding and scope for storytelling now available has attracted some of the world's biggest directors (even Steven Spielberg!) to the small screen.
Whilst TV's current boom is good for TV- and audiences too- it's still unclear what this means for the future of film. That said, it's likely we'll see even more directors making this transition in the future.
The rise of long-form television series is twinned with a general decline in the film industries of many European countries. While there are exceptions, Italian films often struggle to do well overseas, and in France, fiscal difficulties mean that cinema is becoming increasingly mainstream in order to fill seats. Independent directors are finding new scope and creative freedom in television. Paolo Sorrentino, one of Italy’s most famous directors, will make his TV debut in the autumn with the HBO/Sky Italia production “The Young Pope”, starring Jude Law.
http://www.economist.com/blogs/prospero/2016/06/small-screen-big-ambition