Slightly bigger? Look again, the old switch screen has massive boarders and this one lokks to go to the edges as well as being larger by a few inches. It looks steam deck sized. I would say its a significant increase.
And i got the impression that the joycons would be magnetic. That would make connecting and disconnecting them MUCH easier and intuitive. The amount of times ive seen people struggle the first time with the joycons having the button to release.
Seems like a good upgrade to me. And thats not to mention the extra shoulder buttons on the joycons, the larger joycons, and the fact that this likely doesnt reveal everythin nintendo has in store for us.