All eyes were on newly merged UK quad play operator, Virgin Media O2, as co-parent Liberty Global filed its second quarter results, with the spotlight fixed on broadband plans. Doomsday for the DOCSIS cable technology has been the narrative for some time, as suppliers such as Cisco continue to look on nervously at the roadmaps of cable giants like Liberty, and the announcements about UK plans – now the joint venture between Liberty and Telefónica O2 has been finalized – gave little comfort. Liberty Global had looked certain to shift a large portion of its UK network infrastructure to DOCSIS 4.0, but has now decided to leapfrog that technology at Virgin Media O2, and let DOCSIS 3.1 serve its purpose,…