Quote - Correct me if I'm wrong, isn't this similar to Blenders Cycles?

This will allow realtime viewing of changes made to material nodes.

It's not for final render, just previewing...

I hope this is the case, don't have 2014 as yet.

 

That is the raytrace preview....  There's a new "progressive" option in the render settings tab also.  I haven't tried it yet.