The games shown will be good, but I couldn't help feeling disappointed.
SM3DW - Multiplayer, without online just alienates a sizeable chunk of the audience, myself included. Also, from what they showed I get the vibe that it lacks the ambition and grandeur of the Galaxy games. It doesn't look like it even tries to push the genre which is what we've come to expect of Mario for so long now!
MK8 - Awesomeness... seriously looks amazing, just gutted its out 2014... best have voice-chat online!
SSB - This will be sweet! Love that the Blue Bomber is in it! I don't mind waiting for this to be ready. Again, needs voice-chat!
DKC:TF - Looks fun and you know it'll be challenging as with the prior in the series. Just feels like a waste of Retro's undeniable talent. On a system where we have NSMBU, NSLU and Rayman do we need another 2D game right now?!
X - Easily my most anticipated! Looks all kinds of amazing! Shame it's out 2014... the wait may well kill me!
This article sums it up pretty well for me...
http://www.eurogamer.net/articles/2013-06-12-nintendo-retreats-into-its-shell-at-e3