This isn't a case of people saying crap, but we are questioning how the service and technology works. So far you haven't actually refuted any of my answers/assumptions.
Yes, IPTV is completely different from streaming an individual file but that doesn't change the fact that it needs bandwidth. Sticking with a recognised format, take a 3 5 0 meg AVI file commonly found for 40 minutes worth of TV show. Running flat out on a half meg connection that takes nearly 2 hours to download. (Sorry for the spaces but the forum swear filter seems to think I'm trying to dodge it with three hundred and fifty as numbers!)
Why bring contention ratios into the argument other than to point out another complexity that Joe Blogs needs to be aware of? If PlayTV turns out to be wonderful and Joe and all his mates on the street have it then that's something else to cause problems as Joe needs to work out that the (potentially) jittery picture is down to him being on a 50-1 package and it might be solved by paying more for a 20-1 package.
My gripe about the bandwidth and limits isn't that they're in place, but that your website makes no mention of the potential impact to your customers if they have such limits.
Not much is filmed in HD?
http://www.digitalspy.co.uk/article/ds60923.html
http://www.digitalspy.co.uk/article/ds46670.html
http://www.digitalspy.co.uk/article/ds58126.html
If the service proves itself and I spend time reading about people saying how great the service is between launch date and Christmas then there is every possibility I'll suggest my father-in-law signs up as it would suit him. However until it's proved itself my scepticism (sp?) remains.