Though the service still has a lot to prove, its E3 2019 demos were reassuring. That Stadia was able to announce a price, game library, and release date before xCloud — despite having little-to-no industry experience, particularly when compared with legendary Xbox — created the perception that something was awry. That doesn’t appear to be the case. But xCloud presently lacks in a key dimension where Stadia seems determined to excel. That should have Microsoft worried.