Cheeseman,
You are correct about the eMTA modem requirement for triple play. I found that out when I attempted to return my P.O.S. SMCD3GNV gateway after getting my recently purchased Motorola SB6141 provisioned. Luckily, the technician who came to install my X1 boxes was able to work with a customer service technician to get the $9 monthly charged removed from my account. The SB6141 is so much better than the SMCD3GNV - no modem resets, and I can get to the modem statistics page. I bought an ASUS RT-AC68U wireless router which has much better signal strength and coverage than the SMCD3GNV, plus it works just fine with Chromecast. Overall, thing are much better now. I just wish I could get a good price on a X1 double play package and return that stinking SMCD3GNV
.