Low power may actually help Nintendo a bit with third parties (just don't expect miracles).
If you have a handheld roughly about a Wii U (maybe with a more modern lighting/shader structure) and a home equivalent that's 2-3x that and can run the same games fairly easily at an eye-pleasing 1080p ...
A few devs may opt to support it for certain projects rather than making say a PS4 or PS5 game that could bankrupt their company if it doesn't sell well enough.
Also there could be appeal in a developer only having to make (basically) one version of a game and it can now cover both the Nintendo handheld and home market. If I'm EA maybe I do consider bringing back say FIFA and Star Wars, whereas right now I wouldn't consider either for Wii U (6-7 million-ish users just isn't enough).
Sony/MS aren't going to be shaking in their boots about that, and they don't really have to, but such a scenario could be an OK improvement over where Nintendo is now, where their console is almost down to nill for retail third party support and their handheld doesn't get a sniff from most Western devs.
