Not sure what is being said here...
"Monopolies" illegal? Since when? That's what "Intellectual Property" is all about.
The ones where "Antitrust" is involved are mainly about The Need For Taxes or a Friendly Ear for the Competitor, really. Or about bureaucrats trying palliative measures for problems that "Intellectual Property" legislation has created in the first place. Great job.
Now, we got that out of the way...
"But it's clear that in an increasingly digitised world, the delivery mechanism is the big key to creating value and maximising financial returns."
Thank you for the marketing shop boilerplate. But wasn't this always so? A mall creates value because it functions as a convenient delivery mechanism with all-in-one shopping, something that the corner shop cannot deliver. Amazon creates value - whether it delivers digital media or paper media - but offering nearly anything in a controllable manner, something that the corner bookstore cannot deliver. (Anyone who tried to order a book back in the 80s based on ISBN knows how abysmally unreliable bookstores were in delivering the goods.) This is why they die out or why to need to cater to the "non-connected" people or the book-browsing crowd (but then again, when you browse, the person behind the counter will look at you askance. Do I need this? Hell no.)
Hey, more books are being sold, "content creators" have the chance to reach more people and sell more stuff, it's great.
There is only one problem with above: lock-in DRMed formats and arbitary control by the distributor even after the purchase was made. Why is this even possible? Look under "Intellectual Property Legislation". Then be less slothful and go to somewhat shady sites where scans and PDFs can be had free of charge. In the latter case, only I win or maybe the "unauthorized reseller", but hey, the marketplace is not a controlled environment.