I'd be cautious about this. Unless the regulations are carefully crafted, this might lead to a situation where platform owners decide to completely vertically i

I'd be cautious about this. Unless the regulations are carefully crafted, this might lead to a situation where platform owners decide to completely vertically integrate software on their platform, rather than allow third party vendors to play in their walled garden. Look at gaming platforms and their respective stores, for example. If Microsoft isn't allowed to compete with third party publishers on their platform, they might very well say, "screw it, Xbox doesn't run third party games anymore, it only runs Microsoft games". Then you're in a situation where the Xbox is nothing but a vessel for Microsoft software. To a certain extent, we've already seen the gaming industry move slightly in this direction, with Microsoft and Sony buying an ever expanding list of gaming studios. It's wouldn't exactly be a huge leap for them to restrict their respective consoles to running games coming from their in-house studios. Heck, the console manufacturers might actually prefer this model, as they get to keep 100% of game sales revenue, rather than 30% (or whatever it is).