The Tale of Two Nekos will no longer be active on GameJolt, I will be putting my complete focus on Itch io...

That is right, while you can still play the Demo here, the Full Game will be releasing on Itch.io and Steam...

What does this mean?

will devlog posts stop here? no

will updates stop here? no

What does this mean for any future games?

they will no longer be on GameJolt, but later in the future, when more games are in development, they will be phased out of Itch.io as well so they can have their full focus on Steam Digital Store and Consoles...