I am and interested in it too and to be honest I think this is going to work out for Universal (generally) but for one critical reason that would if Disney were to do the same it would not work for them: Universal Kids Resort is meant to be an appetizer park. It's function is to basically create a fanbase for the Universal brand so that those kids grow up and want to go to the "big kid" parks in Florida (and California I suppose, but Florida is who is gonna benefit from this).
Universal recognized a long time ago that their parks are just never going to be the draw for families with young kids that Disney is, and so they've never really used space in their existing parks to pull that market in. But they've also I think seen over the decades what brand loyalty that starts in childhood can do longterm. The problem they faced then was that they couldn't start bringing in child soon-to-be loyalists via their existing parks because those parks are not overly kid friendly. Disney still had that market on lockdown.
So what do you do? Well, you build a park just for those little kids. Those kids are going to go this park, love it, and then when they're older, they will graduate to going to Universal Orlando Resort. This is Universal's way of trying to take some of the little kid audience that Disney has kept mostly under lock and key, likely in hopes of creating the same kind of loyal, repeat customers that Disney's made a killing off of.
Disney on the other hand could not be successful by going to the middle of the country because they're not hunting for a new demographic of visitor. They already have pulled in every major category for decades. All that going to the mid-west or Texas would do is take visitors away from Disneyland and Disney World.