Not necessarily.  Regardless of whether or not Nintendo continues their line of dedicated handheld gaming devices, the Switch will have 3rd party support similar to that of the Wii, where most if not all of the big companies are on board in some form or another, but it misses out on the latest installments in AAA 3rd party franchises because of the power gap.  It'll be hard for 3rd parties to ignore Switch's install base if it keeps selling at its current pace for the next year or two.  We could end up seeing alot of last-gen remasters on the console, as well as the return of "shovelware".

I think the ns is an attempt to satisfy their handheld and console (means home console) fans without splitting their efforts on game developement but I think that the are gonna still split their efforts because the games that do best on consoles and handhelds are different from eachother and they're trying to make each side happy. i agree with ya on switch mainly targetting handheld and only halfheartedly goes after home console market too but they are still spltting their effort between the two.  

Reply to bolded part.

"splitting up their game development efforts was imo one of the main reasons their home console pillar didn't do so well at several points"

I disagreed with that statement if that's the person you were referring to.

Hmm, if I understand you right, you mean they will still produce games that please the handheld crowd and games that please the home console crowd. I agree with you on this. But as both games count to the consoles games total it wouldn't be anymore splitted effort. Also, some games there ported to the other platform in the past, think Mario Maker or Smash. This is unneeded with the Switch.

I disagree.  This line of thinking reminds me of the people who thought there would ever be a Wii U sku without the Gamepad included.  Never happened.  Why?  It completely goes against the entire purpose of the console.  Not having a Gamepad connected to the Wii U would have rendered entire games in its library unplayable, and MiiVerse similarly unusable.  The specific reason the Wii was even created was because Nintendo knew that if the Wiimotes were created as just a peripheral to the Gamecube, not everyone would bother to even give them a try.  The entire purpose of the Nintendo Switch is that it seemlessly "switches" between home tv and on the go handheld play.  A Nintendo Switch that you can't leave the house with isn't a Nintendo Switch anymore.  Same thing for a Nintendo Switch that you can't hook up to your tv.  Why would you even want that?  It's versatility is it's entire selling point.  It's not like removing the 3D slider from a 3DS and calling it a 2DS.  At the end of the day, they are both still DS'.  If you take the portability or home console function away from a Nintendo Switch, what is it?

Yes, that's what I mean and yeah both types counts towards the total (that don't really matter unless we're in a list war). What I mean about split effort is that the bulk of the games will likely canter more to one side than the other. I think it should sway more towards the handheld side. We'll see, though.

based on?

Switch 3rd party support can only be better how instal base is growing and Switch continue to sell good. For Wii U was opposite situation, it start selling from start very bad and had very low instal base and was obvious that platform does not have future, that's why hole 3rd party abandon Wii U in 1st year.

Its not same, with Wii U hole system was made around gamepad and there are plenty of games that couldn't be used without gamepad.

Main selling point of current Switch is that can be used like real handheld or like real home console, but entire purpose of Switch is to unify handheld and home console in one platform, current Switch hybrid is just a first iteration like part of that platform. There will be Switch just for handheld play, maybe even Switch just for home console use, maybe bigger or stronger Switch also, and they will still be part of Switch family similar like 3DS family. Switch can already be used like real handheld and like real home console, so totally different situation compared to Wii U. Why would Nintendo do that, or why they released 6 iteration of 3DS!? To offer different price point and different value to market, remember, currently 3DS family has price point from $80 to $200. But main point of 3DS was actually 3D, and they just moved away 3D and made 2DS that isnt clamshell to make more affordable version of 3DS,  and of course that still need to be dual screen because if that wasn't case it couldn't be able to play 3DS games (Switch doesn't have those problems). Also Switch is hybrid, home console and handheld in one, do you really think Nintendo will release separate successor to 3DS or new separate handheld platform, and again divide they resources to two different platforms!? Of Course not, they will just release smaller and more affordable Switch just for handheld play (maybe will be compatible with Switch dock, but dock it want be in package with Switch Mini/Pocket in any case) that plays same games. Also with Switch like hybrid device, Nintendo have much more possibilities for plenty of different iterations that will all be part of same platform.

The eggs are in one basket now - let's make this one count Nintendo!

Probably more like 3DS levels, so a lot of smaller projects + some third party AA titles, but few AAA titles (unless they do not require powerful hardware).

Add in Vita support as well.