I still think there could be smaller 3DS type games on the Switch, but that limitation is no longer there. So Nintendo could opt to make more bigger titles than the latter.
I would agree as well, but they'll be of a different type than the ones that were on 3DS. Meaning, instead of some one-off puzzle game that only really works in handheld mode, we'll see something that uses the Joy-Con in a unique way that can translate well to both docked and undocked play-styles. With the Switch, there's no longer a need to make games that are strictly meant for on the go play because nearly every game can work well in both contexts.
The Switch will always lean a little bit more towards handhelds than proper consoles. But that isn't as bad as people might think. We are not going to see every major third-party title in 2019 or 2020. A few ports and even less by the time the next generation arrives. But we'll see almost all Indies, more second party and creators of handheld games evolving around Switch and experimenting with more power. With Pokemon, Fire Emblem, Metroid or Animal Crossing for the first time on this HD system exploring new possibilities.
While Fortnite, League of Legends, Counter Strike GO, Dota2, Path of Exile or Warframe prove, that the most successful games often aren't built on the newest hardware.
Next gen probably won't be as important as people really think. AAA games are expensive to make and are fewer in numbers because of that. Mid-tier and indie games have really helped disguise this fact this generation, so the Switch will still have plenty to pull from in that regard. Not to mention the Switch's hardware was designed to support nearly every modern engine under the sun, so porting these games to the system, plus the occasional AAA game that can run on it is very easy.