Like vultures hovering above a corpse, Ericsson’s rivals have been hanging around waiting for former Mediaroom customers to lose faith in their migration path and then pounce with their alternative multiscreen platforms. Cisco is the latest, with an initiative to move Microsoft Mediaroom customers onto its Infinite Video Platform (IVP), which is a multiscreen service delivery platform rivalling MediaFirst, Ericsson’s newer offering, which it has been positioning as a migration path for Mediaroom users. At this stage it looks like IVP has leapfrogged MediaFirst in capability after incorporating components from an impressive array of partners. Cisco decided to go with the flow and make Android TV its primary middleware through collaboration with Google, to integrate it tightly and enable access…