The "salesmen pushing junk for a cut, orators getting up on soap boxes, shills pushing agendas, rabble rousers pushing politics. " are not forced upon you. You choose them. This will never affect you or your specific storefront unless you want it otherwise.
How do you know it will never affect anyone outside of their "curated store"? When someone can influence tens of thousands or hundreds of thousands of people, that gives them the capacity to direct that influence. The positive side is they can, potentially, feature games that deserve exposure. The negative side is they can push agendas or products that don't deserve exposure.
I prefer the store to be as neutral as possible. That's where it is right now, with little outside influence. Valve makes some decisions on what to advertise on the store front but that's it. I remember them mentioning they'd want companies to be able to write their own store front pages. That's fine. But any random personality from Youtube or Twitch or Twitter? What happens when a Machinima type conglomerate buys out a bunch of influential personalities and uses them to push products?
This isn't a fanciful scenario. It has happened on Youtube already, and in conjunction with major corporations in the industry such as Microsoft. This is a mega-billion dollar industry, not a mom and pop operation. There are powerful corporations interested in the performance of every service, from Amazon to Nintendo to Steam.
Obviously the store and interface needs to evolve. Open, hands-off standards are great. The world wide web works because it is a completely free, open, hands-off set of technical specifications that anyone can adapt to their needs. There is the consortium, however it exists solely to work on the technical specifications. It maintains its neutrality by limiting its scope of interest to technical specifications and related issues and by the fact that the web is a free specification, not able to be owned by anyone.
Steam isn't a completely free, open, hands-off specification, though. It's run by a private corporation who takes a cut of everyone's sales on the service. Its health is tied to the financial performance of the participants in its market. Thankfully, it is not run by stock holder interests and is instead run by a very smart, fairly altruistic individual and his like minded employees. However, it is still less free than the world wide web's technical specifications, and that makes it somewhat vulnerable to influences beyond just technical concerns.
Which is my concern, because I rely on the Steam service to be as neutral and agenda free as possible.
As I've already said, it may turn out to be nothing, however at this time none of us knows how exactly it'll turn out. That is, unless one of you is a Valve Steam client developer.
I can already see the pewdiepie storefront of the future.
Ish