Comcast already reported its Q1 results earlier today but on the earnings call CEO of the cable division Neil Smit revealed its next generation X1 cloud DVRs (previously called Xcalibur and promised for a wide rollout to "hundreds of thousands" of customers this year) will launch in a major market in the second quarter. Light Reading cites sources indicating field testing is already under way in Boston and that it could launch in May which fits all too well because The Cable Show will take place there May 21st. In case you've forgotten, the quad-tuner X1 DVRs have an all new UI with support for third party apps and social media tie-ins, and will reportedly precede the company's eventual push towards IP video. While that's the rumor, what we do know is that TiVo has completed the rollout of Comcast video on-demand support to Premiere DVRs in the Bay Area, and also let us know that Boston, coincidentally, will be next. Customers in other areas can sign up on TiVo's site at the link below for notifications when the feature goes live in their neck of the woods.