The carrier WiFi landscape was originally dominated by cellcos and mobile offload, but this year the momentum has shifted firmly towards the cable operators as they build huge networks of hotspots and homespots to support a wireless arm to their quad plays, and reduce their reliance on their MNO agreements. The leaders in this trend, on either side of the Atlantic, are the US’s Comcast and multinational media group, Liberty Global. Now the two giants have entered into a roaming deal which will open up huge numbers of locations to roaming subscribers. The main WiFi players are stepping up their activity in roaming to expand their coverage quickly, as epitomized by the CableWiFi venture between Comcast, Time Warner Cable, Cox,…