Obviously you don't know anything about 5G other than it's being rolled out slowly, read up on how poorly it performs in real life vs the hype that the cell companies were putting out there before launch. If you are near a tower and outside you'll be fine but the signal doesn't travel very far so they are going to need to build out tens of thousands of towers which makes it cost prohibitive so good luck seeing it cover as many areas as 4G, also even if they were able to do that the signal doesn't penetrate through walls well, it's flawed technology.
Xcloud is streaming is 720p right now and even MS admits it's running into some issues and that's totally fine because it's in it's testing phase it's not in it's final form so we'll see how it turns out but what's the point of streaming at home? you'll get an inferior experience to owning a piece of local hardware. Gaming isn't like streaming a movie, if the res just dropping was all you had to worry about that would be an annoyance but you could get over it, when it comes to games more than just the res would drop though and it will impact gameplay.
If they want to offer it as an option and not a replacement that's totally fine but when people say that they think streaming will be just as good as on hardware or that they would rather play a streaming gaming system than have a console I think they are trying too hard to be a cheerleader and not thinking more about what their own experience will be. Also let's not forget right now they seem to be focused on mobile vs streaming at home and carrying around a controller in your pocket to play console games the way they are designed to be played on a 6 inch screen running at a lower native res than your phone can output is hardly going to be ideal. They want to sign people up to another service, they are a service based company but this isn't a service I've heard people crying out for.
I've said in the past that power differentials won't make a difference next gen because they'll be so close, hell I've said it a few times in the last few posts, Digital purchases and BC are going to be a fairly big thing in keeping people in either the PlayStation ecosystem or Xbox ecosystems when the new gen comes. In the past we could all just go trade in all of our old games towards new hardware, now a large chunk of people are buying all digital and they have games that they'll just lose if they don't stick with their current console of choice. Streaming to your phone etc isn't going to do a whole lot one way or the other and if MS doesn't come up with a lot of high quality 1st party games it's not going to bring new people over regardless of what sub services they offer.