I am saying that digital content will one day be freely available (or available on a subscription) because it costs nothing to copy. Never before has content been restricted when it could be copied freely. Radio is free television is free and websites are free. I think that is the natural end point of intangible goods it is just a matter of figuring out how to pay the content creators.
Intellectual property is an umbrella term that encompasses copyright, trademarks, patents, etc. Using someone else's trademarks also does "not harm or threaten to harm anyone else's property". I know that you don't mean that, but in that case, you should offer more practical arguments against IP instead of getting all philosophical.
What I can say is that the area that the term covers is arbitrary and that you can discuss one facet of it without involving the others.
There is no reason that trademarks need to be discussed when talking about content distribution systems just like there is no need to talk about expiration dates when shipping plastic lawn chairs.