Intel should be releasing the socket 1150 Broadwell CPUs in Q4 2014 because they had a problem with low yields using the new 14nm manufacturing process. The problem has been resolved Intel is currently manufacturing Broadwell CPUs, however, these are the embedded version that are meant to be soldered into the motherboard.
Intel will probably start manufacturing socket 1150 Broadwell CPUs in late Q2 or early Q3 2014 so they have plenty to sell in Q4 2014.