Hmm, this kind of reminds me of the first gen Cell Phone browsers, when you had to access WAP sites to get content. (I supported those buggers for years) Eventually smart sites would just redirect based on the browser. Then the "mobile browsers" got better. Seemed OK for a while.
I think it's a similar threshold to cross, once the hardware and content converge. So around that time, the content providers will have no choice but to comply, or vice versa. Not to mention the certain increase in mobile bandwidth and capabilities. Not everyone connects to any bandwidth worth mentioning today.
Try viewing web sites with a stock browser (of your choice, any OS) on a computer unless you add every darn proprietary thing, just not feasible or workable.
E-Ink, (I like it) great for text, especially on the new ones. Hey, these are readers, not really "web devices".... yet.
Now every darn web site (not an HTML comment, ahem) requires so many add-ons, it’s stupid; but your right in a certain way, we now have expectations that mobile browsing on any device should have the same experience as your computer per se, or whatever your expectations are.
Most e-Readers are just readers providing simple reading content, that's all; however they are evolving fast and the content providers will follow the flow. The current web access is there only to obtain content (just like ring tones, etc) IMHO. No one wants simple B/W web sites (wake up) :) E-ink is very cool and easy on the eye(s) for text.
If you want to browse the web on a device in your hand in color, with bells and whistles; meaning you want it all, then give it some time. Much more interesting to me is to see how this will develop in terms of what we get/want. Really this is the big question, which I am certain will soon to be analyzed here and elsewhere soon.