I think the Joy-Cons will make it hard to do a very extensive redesign of the Switch. However, the large bezels of the current model do leave room for a slightly bigger and perhaps higher resolution screen. Things like battery capacity and integrated memory could also be updated along with adding cameras.

But I see none of this happening this year or even in 2019.

I'm not getting where people think that the Switch is going to get some giant redesign like the 3DS XL or Game Boy SP. Everything about how they've been marketing and treating it seems to me like they think of it as their next big home thing that can also be portable, not as a handheld exclusively. The Switch works fine as is anyway.

Wait if you want, but I'm not seeing the neon signs you guys are apparently seeing.

They should put a proper d pad in for the joycon then up the battery and increase the cooling to allow for a docked performance in portable mode.