How is the Ones and Steam's internet service different?

[thranx]

CGI-Quality said:

Aielyn said:
If Steam's servers go down, I can still use my PC.

And play your games offline (although I can see some kind of workaround here from Microsoft, eventually). In fact, it seems like Microsoft's way may be stricter, but I log into my account(s) at least once a day, anyway. May not have a bearing on me at all.

I think they also said you can use your cell phone (if it has broadband internet) to check in