Cheers mate, this house was before i bought, so not my house hence carefactor was low.

Just dealt with it for a few years.

Pretty certain a lot of TV broadcasting will be multicast across NBN as it becomes available in the next 10-20 years, which I assume will mean there will be more bandwidth available compared to what there currently is OTA.

I think a few providers have already applied to NBNCo to do this.

So all channels could potentially go true 1080P and possibly even 4x HD further into the future.

Be a long while off, but TV antenna's will slowly die.