Why news channels? Rahul Shivshankar is already shouting in HD (Anjana Om Kashyap as well, for Aaj Tak HD). We do not need Faye D'Souza in HD. Fortunately Arnab has never shouted in HD yet, though Republic HD may come within five years or so.
As I have said repeatedly, Zoom HD is much more desperately required. However, Times can launch The Holiday as a channel/service as well, without this being a dummy name (like Times Now 2, 3, 4, etc. or ET Now 5, 6, 7, etc.).