Yes, the Direct this week will focus all on 3ds games and 3ds games alone.
However, I don't need to know anything about NX as long as they simply give the date for the NX Direct or reveal or presentation or whatever they want to call it. Let's hope to see Reggie at the end of the direct to come out and say, "One more thing, tune in on so-and-so date to hear information regarding Nintendo NX."
A simple reveal date is all I need to ease my mind of this NX rumor barrage. Give us this one thing, Nintendo.