Respawn are saying cloud infrastructure is useful because it enables you to run various services over a network and that the services scale to match demand. This isn't unique or new, and it certainly doesn't mean MS are ahead of Sony/Gaikai when it comes to cloud gaming, which is a specific application of the cloud that requires its own R&D.
You made the argument regarding the dedicated servers and infrastructure, saying MS hasn't been clear on it, and Respawn says that MS is offering dedicated servers as well as access to Azure on the whole. Furthermore, neither the current PSN infrastructure nor the Gaikai network are on the same scale as Azure and the MS datacenters atm. You are also saying that PS+ promises better infrastructure, yet discredit the fact that MS is actually delivering on that promise.
Cloud gaming is still a ways off, especially if broadband penetration is as bad as GAF tells us it is. Long term they might be strategically ahead, but people still want discs in the drive, and most of them don't want to have to stream their games when they can pop it in the drive or run it off the HDD.
Gaikai as it stands is a cloud gaming service, Azure is basically a web platform. Given the details we know now, Azure will have an immediate impact, and the other is yet to be determined. I'll wait to see what Gaikai encompasses before fully judging it, but Azure is looking very promising for the platform.
Now I'm really going to bed dammit!