Better is relative. If google has lower performance they could charge less and could still be considered better cuz of it. We are also talking about trillion dollar companies with MS google and amazon here, on a days notice they could each invest 10's of billions and each have better services. just recently the US government announced that they are partnering with AMD ryzen and Nvidia to have the worlds most powerful server farm and/or super computer and google announced shortly after that they want to one up them. And im willing to bet is just for bragging rights.
Better is better for the customer. Customers want the best experience for there money and so far Azure is doing it better than Google based off the beta testing. Sure these companies can invest billions more into there infrastructures however these things don't happen over night, by the time they upgrade all there server farms, next gen would have started and companies will need to have made these deals now not later.
Streaming is going to improve yearly as better internet and servers come out, that is a no brainer however so far, with what's available, not many companies are going to skip Azure as we have seen even Sony could have gone with someone else instead they went with MS there direct console competitor because maybe Azure is the best deal for value going around currently. Also MS make Xbox, a dedicated gaming platform with history of success, I doubt companies will opt for Google as they are still unknown on there success in this industry.