I don't think it's all the One Connects across the entire product line, but jsut the higher-end sets.  I got my first Q9FN (75") in last week and took some photos and measurements of the new box.

It's about 15-1/2" long x 5" deep (plus connectors) x 2-5/8" tall.

This new box includes the TV power supply so it's only the single Cone Connect cable between TV and the One Connect Box (no outlet needed behind TV).

I'm sure this appeals to the masses who are self installing and don't want to mess with adding an outlet, but creates some challenges for us.

This new One Connect box also uses a different cable than the small fiber cable from the 2017 models.  It's a little larger and contains a braided power cable... if you're ordering the longer 49ft cables make sure to get the right one that matches your TV model.