I'll be curious how they execute this platform envelopment attack as I think its success will largely rely on their operational efficiency (something neither Comcast nor EA are known for). Comcast certainly has a major advantage over other remote gaming providers in terms of latency, but even being the closest hop to their customers, I don't know if it's quick enough for certain games. I don't think they'd cache the game locally on the customer's X1 client as it those devices won't have anywhere near the processing power of a modern console. I also have serious doubts about using tablets as controllers as described however I presume their target is casual gamers (i.e. those who never owned a console before they bought the original Wii). It will be interesting to see how those users respond.
I am also curious to see how MS & Sony will respond. MS currently offers a Comcast app on the Xbox 360 (and I presume the Xbox One); will both sides continue with that service? Does anyone know how the financials work with that (i.e. does one side pay the other)?