Not sure I'll be getting the Switch.
I bought my 3DS because it had a price drop, and by the time it occurred, I could afford it, and it had lots of games that interested me (PSA: I'm not done playing those who interest me, and being able to program stuff on it still makes it alive for me).
As for the Wii U, I mostly bought it as a replacement so I could give my old Wii to my brother, and I mostly bought it for Xenoblade X and Super Smash Bros. (and still having fun with it, I'll be bringing it again to a party soon). Mario Kart 8 was fun, but not necessarily a game I was set on getting (well, got it along with the console anyway, and enjoyed it).
For the Switch, I'm not so sure. There's no Wii U backwards compatibility (expectable, though the reveal trailer makes it confusing), no 3DS backwards compatibility (Well, with one screen, it would have been hard anyway... We would have had DS-VC quality stuff, and it's not as comfortable as the real thing, or adapted hardware), and no games that interest me for now.
So, unless they do pull out a new Xenoblade on it, a new MH, maybe a new Smash with the quality of those made by Sakurai, I doubt I'm getting it.