People definitely need to wait E3 first, it seems that most of 3rd party taking "wait and see" approach with Switch after Wii U, and that more and more 3rd party will be on board buy time and how Switch continues to sell well.

If you examine Nintendo's statements and press releases you will hear a rhetoric from them that they have realized the fact that they will have little 3rd party support for a while. This is the reason why they've committed to the Switch release schedule of having a BIG 1st PARTY GAME come out every 2 or 3 months. They have examined the failures and strengths of past endeavors and they seem to be doing well right out of the gate.

AAA games? If it was only docked mode devs need to care about, then yeah, sure. But with HH mode on top of it...really doubt it for most of them., at least from technical point of view.

I want Nintendo murdering the 3DS and releasing all of its games on the Switch. I love indie games and I think the new eShop is really cool, but we need 3rd party games, AAA games to create hype and bring in the system the general public.

Some 3rd Party is need it.

Wonder Boy: The Dragon's Trap just released on Nintendo Switch. 3rd party support is there. Now go get the game.

Don't know about what technical you said, but GPU clock of the Switch is slightly better than Xbox One GPU, if you doubt about the Switch specs

Oh dear...mate, not to be rude, but you really don't know much about hardware, do you?

First of all, XOne's GPU runs @853MHz, while GPU part of X1 inside Switch runs at 768MHz when docked...not that this matters at all really...because:

XOne's GPU is 768 shader GPU, which translates into 1.31TFLOPS at that clock speed, while X1 in Switch is 256 shader part which translates into 393.2 GFLOPS. Sure, it's not wise to compare FLOP for FLOP, not even from the same vendor if it's not the same or similar tech, let alone from different, as is case here of AMD vs nVidia, but without going into TMUs, ROPs and memory bandwidth this will give you fairly decent impression of where it stands.

And this is docked. Now take HH mode, downclock GPU inside Switch even lower to 307.2MHz (or 384MHz, dev's decision) and you come up with 157.3GFLOPS (or 196.6GFLOPS).

As I said, if its only docked mode they need to worry about, yeah, sure - maybe it woudn't be as easy as it could've been if Switch had little more juice, but if market is there they would make the effort. But with such a low HH performance, I don't see many AAA devs doing it.

No, I'm not worried, partially for the reasons you outline in your post, particularly engine scalability and the plethora of indie support the system is receiving, which now takes the form of middle-tier retail releases as well as small scale digital releases. We're seeing a steady increase in support, there are now 20 Unreal Engine 4 games in development for Switch in Japan, for example.

I would be more worried if, at E3, Nintendo only announce a couple of new first party projects, rather than an interesting array of titles coming from mid-2017 until mid-2018. Ideally, Nintendo will release Pokemon Stars and Smash Bros on Switch this year, which, with Mario Odyssey, Splatoon 2, Zelda, and Mario Kart 8 Deluxe means Switch should host half a dozen major Nintendo titles which will sell 5 million or more life-time, and what's more, these titles will launch in the first 9 months the Switch is on the market. That will be vital in establishing momentum for Switch, which should see more third party support - primarily from indies and Japanese developers/publishers - emerge from 2018.

The combination of steady Nintendo releases, Japanese support and indie support should ensure Switch gets off to a decent start. The indie support is practically guaranteed at this point, but Japanese support will rest on Nintendo getting their software slate right, which is never a safe bet. However, given their recent Direct was a far cry from the early 2013 Wii U panic Direct (announcing multiple titles years from release), there are signs Nintendo's internal development is in a better place.