Trial or not it still puts to sleep your statement about Sky being at the forefront of pay TV innovation. If I was paying a HD tax I would expect VM to offer me more but as it stands now there's more HD channels and HD and 3D VOD content than I could watch and still consider it value for money, so I don't think they need to catch up to anything.
PS. the gimmick that is 3D gives me a headache so I have less interest in it and hope VM eventually do too.