Having more power isn’t exactly the important part. Just having a new system that is better than the last is the important part. Power also isn’t the only important part that could factor in to it. Nintendo will have a new system like this eventually, probably next year. Lite won’t be the last of the switch family
If newness is the important part, no need to even bother with a substantial power upgrade. I agree they'll be more Switch models, but one targeting power would be pointless.