So, any app can be an app store? This means that any low-skilled coder can cut and paste the example app store app, change a few lines and the JPG artwork files, and build an app store. This means there will be tens of thousands of app stores in Europe. Heck, I might try making one just to see if I can make one. Lots of people will do the same. Most app stores will be pointless and have maybe a half-dozen example apps in them.
This is a genus move on Appler's part. They give the EU commission what it asks for while making it useless. If Apple had allowed only 2 or 4 app stores then Apple would have faced some competition but by allowing many thousands of app stores they make the entire idea pointlessly useless. Who now would invest money in an app store knowing that any kid could compete in that space?
They have lowered the cost and technical knowledge required for building an app store to about zero.