Even though Nintendo has managed to get quite a developers on board to support the Nintendo Switch, and they have dozens of games in development for the system, there are still some developers who haven't got jumped on board, but are still talking about the Switch... such as the Final Fantasy XV director.
Hajime Tabata, speaking with Polygon, explained his ambitions to explore Nintendo's new hybrid system, but there's only one problem: he's not sure what he wants to do with the system yet. Tabata states,
Unlike some developers who have either stayed mum or made an excuse about not being able to develop for the Nintendo Switch, Hajime Tabata genuinely seems to want to tackle a project on Nintendo's new system. It's definitely a controversial little system due to its design. Based on the early unconfirmed specs, the Switch appears to be similar to Nvidia's X1 system- but due to purposefully having the GPU and CPU capped to cut down on heat and conserve battery. The Switch supposedly performs under par, making it slightly weaker than the Xbox One, according to the devkit specs.
Now we can't know for sure if the Nintendo Switch's specs are final based on the old devkit documentation. Sometimes the early kit specs are lower than than what the actual system is, in order to keep developers working within the available resources and ensure the early launch titles are properly optimized. Sometimes down the line the devkit specs are opened up a bit more and developers are given a bit more to play around with.
All of that is to say that while Final Fantasy XV is a very demanding game, even for the Xbox One, PS4 and PS4 Pro, there's still a lot of talk and speculation about whether or not Square Enix would invest in porting the game over to the Nintendo Switch. Scalability and system resources would most definitely become the order of the day. As some conversations online have indicated, it's not so much the docked home console mode that would be the problem -- given that developers could easily lower the resolution and port over the Xbox One version of the game -- it would be the undocked version that could prove to be a problem. While Final Fantasy XV could go from 900p on the Xbox One to 720p for the Nintendo Switch while in docked mode, there would still have to be concessions made from the Switch being docked to the Switch being undocked. Some developers would most certainly have to think about that in terms of porting over games from the eighth gen twins to Nintendo's Switch.
It definitely puts into perspective Hajime Tabata's comments about not being sure what to do with the system because straight ports would be a monumental task, but something original -- which could take years to make -- could afford the developers to take stark advantage of some of the Switch's really cool motion and rumble feedback features, as well as the asymmetrical multiplayer with the tablet-style tabletop gaming option. For now, Tabata and the rest of the crew are focused on optimizing Final Fantasy XV to run right proper on the PS4 Pro.