I seriously doubt Nintendo will come out with something that will compete with the new consoles (as in 9TF territory), since that will cause a split in the user base and I don't believe Nintendo want that.If this is something that's meant to be beefier and compete with the new consoles color me surprised. I figured Nintendo would just coast on the current Switch models for at least 2 years before releasing any new or updated hardware.
It IS possible it will be beefier, but if so it will at best be more like PS4 Pro vs PS4, playing the same games basically but with better performance. And maybe it will have a competent 4K scaler for docked mode.