Why do we have to put up with the same 4 channels?

So these days anyone with access to digital TV gets the benefit of better quality pictures and better sound but also a lot more channels. Or so we think.

Yes there are channels like SBS 2 and ABC 2 but then take a look at the major commercial TV channels most have a HD and a few SD channels which seems great until you realise most of the this extra channels only play the same programs.

For example 7-1234 & 7HD pretty much act as one channel. WHY! This seems pointless to me. You have access to 4 channels but realistically only use one.

I hear that this is up for review in 2009 from the government