Yes you can, one online and one offline can play the same game on the same account.

also the internet is free.

You can't directly compare a digital program (which is one of many free programs to download on an open platform) to a physical console (which is a closed console with 1 singular digital venue). They don't even have the same practices if you do try to compare them that way. 

Steam:

1) Open program. You can purchase games outside of Steam and activate them on Steam. Valve is not the only company who sells you games. There is... drumroll.... competition! Don't want to pay Valve's prices? Have a different dealer you want to buy through (such as Amazon)? Great, do so!

2) PC is an open platform. Steam is not the only digital service, has competition and doesn't hold an iron grip on sold products.

Xbone:

1) Closed system. Only one program to buy games through and only one vendor. Also on a closed platform with no other competitors selling digital content.

Greenmangaming for a start. But that's just the tip of the iceberg.

Not much difference in terms of infrastructure, but you have to bare in mind that the two should not really be compared with one another. The whole point of a console is that its easy to pick up and play and is convenient for the general consumer to buy and play their games.

For PC, before Steam came along, the whole gaming scene was a lot more fragmented and harder to get into. There was no centralized system in place for publishers to release their games.. So for each game release you had to individually type in the CD key before playing them. This of course means that for every time you want to play a game (which is not already on your PC) you would need to dig out your disc, booklet/cd case (with your activation code) install, then activate it. Then you have patches. Before, you'd have to search online for every update and update it individually. And if you lose your code, then you're pretty much screwed. Now steam fixes a lot of those issues and has makes it convenient for consumers (like me) who likes to play games without the dealing with all that hassle.

The DRM system in place for the Xbox One does nothing BUT inconvenience me. So WHY on earth would I consider a console which does everything WORSE than my PC.. which btw is even more restricting since check up on me every 24 hours.. and takes away any benefit I have from owning a console.

And before anyone rags on Steam for being the same. PC gamers have accepted the Steam ecosystem. There is competition on digital front from all kinds of e-tailers plus the services Steam offers are FREE and not stuck behind paywalls of some closed of platform. For consoles, DRM is practically a nuisance and does nothing but take away from the right to do things with your purchase WITHOUT the benefits of owning one.

It's funny, because as technology evolves, so does the restrictions on how we use our things. If you spoke to someone about this ten years in the past they would probably tell you to "do one" and fuck off. Now it's completely acceptable to have online DRM, pre-order DLC, day one DLC, retailer specific preorder DLC, restricted rights and all the other bullshit publishers and console manufacturers pushed onto us.

Quick look at Green Man Gaming website. See Skyrim Legendary Edition on the front page. Look at price: $59.99. Same price as on Stream. Take a deeper look at newly released games: Remember Me at $49.99. Same as on Steam. Grid 2? Metro Last Light? Both $49.99 on both services. 

So yeah... The heck are you talking about?

Cause you can choose to not buy steam retail games, on x1 is mandatory on all games also Steam is on PC not a console.

Quick look at Green Man Gaming website. See Skyrim Legendary Edition on the front page. Look at price: $59.99. Same price as on Stream. Take a deeper look at newly released games: Remember Me at $49.99. Same as on Steam. Grid 2? Metro Last Light? Both $49.99 on both services. 

So yeah... The heck are you talking about?

So if they do not buy a retail steam game they will have to download it from steam. You and you alone can play that game than, this is not the case with the Xbox one which allows up to 10 "family" memebers to play the game simultaneously on different accounts or systems without the need of the disc. While on steam if you switch PCs you have to redownload the entire game again.

Why does it matter then Xbox is console and Steam is on PC? The point is Steam is more restrictive and offers less but gets praised. The Xbox One is built for the future, and MS knows the Cloud is the future just like they XBL was the future when they built the first Xbox.