I think these points are far from a neutral issue and there are some major stakeholders and very big money involved.
On the ebook front, to me, ebooks look like an attempt to woo publishers with a production and distribution model that they're familiar with, rather than a solution for creating and developing reference and learning resources.
The questions in my mind, from a purely learning and teaching perspective, are: What can ebooks do that HTML pages can't? and What can HTML pages do that ebooks can't? If learners and teachers can cache pages and resources from their LMS'/libraries/PLEs, and ereaders/tablets can read HTML pages, why would we need ebooks? I'm sure ereaders will develop over time so that they can read HTML pages without the need for special conversions.
The issue only gets complicated when you bring DRM into the equation, and DRM is better at making legitimate users' lives difficult than it is at preventing copyright infringement.
I'm pretty sure that if education departments take the lead and support standard Linux operating systems for mobile devices, we could reduce a lot of the exploitative practices of media moguls and therefore reduce the costs of learning resources. For the time being, they can be convinced to develop DRM-ed desktop apps to "protect" their content while, at the same time, keeping our options open while looking into the future. Let's not trade the freedom and flexibility we have now to please the moguls... they'll never be pleased and never have enough control over us: https://www.eff.org/press/mentions/2009/10/2
On the repositories front, I think rather than push centralised repositories, it'd be more efficient and stable for individuals and organisations to create their own repositories (distributed networks) and maintain ownership and control over them, i.e. allow them to delegate privileges and responsibilities to whoever they please, maintain their "brand identities" and ensure correct, accurate attribution and licensing. I think this will happen anyway as it's already happening with most of the open courseware projects. I think one of the major problems with open courseware is being able to find the appropriate resources that we're looking for. To be blunt, Moodle.org is less than desirable for finding stuff like documentation and other information. If we can develop widely adopted standards for metadata and sharing, then we can leave it up to 3rd parties to create aggregators to index and make learning content easy to find.
EFF.org Apple ebook search results: https://www.eff.org/search/site/apple%20ebook
Closing thoughts on Apple's greedy, "crazy evil" iBooks license: http://www.zdnet.com/blog/bott/closing-thoughts-on-apples-greedy-crazy-evil-ibooks-license/4414
Why Apple Won’t Allow Adobe Flash on iPhone: http://www.wired.com/gadgetlab/2008/11/adobe-flash-on/