It's just a higher clocked 3700X, no one will buy it. I would only recommend the 3700X for new builders, and only a 3900X if they need more cores as it is a waste of money for gaming. But going forward 12 cores might be beneficial in games, who knows.
I do wait for reviews of the 3800X though, since just like with the 1800X compared to the 2700(X), it could reach higher clock speeds, and comes with a higher TDP to boot this time around. While for normal people the 3700X would certainly be better, the 3800X could potentially be much better for overclockers.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454