I thought fearmongering was the exagerated spread of rumours to actively cause panic. What we are discussing here are neither exagerated nor unfounded, this are examples of activities and practises that publishers have used and abused in the past and would almost certainly use again with a streaming-only system.

Has Google announced any policies on these topics? It's like you have formed the mindset that will just allow all this.

I just had the internet fall out on me for about 30 minutes, last week it was two hours and i am expected to trust streaming, No way

How do you even play call of duty or fortnite

I don't, i play Breath of the Wild or Mario Odyssey

edit: and tomorrow i will play Sekiro and then next week Yoshi's Woolly World

Most of this subjects are not really tied to Google's policies, but to the general behaviour of the market.

-Always online DRM is necessary on a streaming only system, with all of the negatives that implies.

-Competition with older titles has been something rather frown upon by big developers. How many servers have EA or Activision closed down, effectively killing many games? The difference is that, because you don't really own or have the game in any capacity on a streaming service, you can't even revive it through homebrew methodes. Your purchase is basically moot at this point. You get nothing.

-Game preservation will be moot as well, so if they want to censor a game (or erase it completely for whatever reason) they can do it and there's no possible way to stop it. At least with physical media (and digital to some extent) you can keep them on your hardware until they fail. Hell, as bad as piracy may be in some cases, it is the only acces to a plethora of abandoned games nowadays, that is a fact.

-Google is an advertisement-based company, so suspicions about intrusive ads is not unfounded. There's also the possible problem of Google tryint to sanitize the content kept in Stadia just like they did with YouTube, potentially affecting the artistic freedom of many developers.

-No access to the game code means no mods, so that is just out of the question.

-Account stealing could make one's purchases completely obsolete. On a regular platform, you at least can access the single player games you have installed (as long as you don't need always online DRM). No luck with Stalia, because it is always online and you have nothing on your hardware, so someone can steal your accound and you are left with nothing until the problem is resolved. I forsee this being a massive plague during the first year of the Stalia's lifespan.

Everything you listed is a current problem or something the consoles crowd(the most vocal) would have to deal with anyways. Most of the shit you listed Google "could" control. You thinking about this from a current age perspective. What kind of new policies would a streaming/digital age have? 

So hows google going to effect that?

Because if have to stream a game and the internet goes out i can't play the game obviously

That is a very defeatist attitude. People complained during the XBOne's original reveal and Microsoft had to change its policies, so voicing our opinion is never a harmful thing, while just accepting stuff we don't like is a very easy way for it to become the norm.

And considering how much companies have been pushing digital over physical and yet have not delivered their promises without twisting them or outright ignoring them, it's pretty reasonable to want to slow down this supposed inevitable digital future. Google would not want to piss off big publisher by putting them on a tight leash, especially not now they are just starting, and considering the lack of supervision in the mobile market, a market Google has a rather sizeable control over, "could" becomes more and more vague.