The article should be titled, 'Adobe tells Readers to Eat Shit and Die'.
The tl;dr version is that Adobe is going to start pushing for ebook vendors to provide support for [their] new DRM in March, and when July rolls Adobe is going to force the ebook vendors to stop supporting [their] older DRM. (Hadrien Gardeur, Paul Durrant, and Martyn Daniels concur on this interpretation.)
Look, I'm known for my resistance to DRM, so I am really not trying to say, 'I told you so', but I fucking well told you so. DRM is a failure for everyone except the companies selling the DRM tools and here is just more evidence.
One thing Adobe seems to have missed is that there are tens of millions of ebook readers on the market that support the older DRM but will probably never be upgraded to the new DRM. Sony and Pocketbook, for example, have released a number of models over the past 5 or so years, most of which have since been discontinued.
Your lesson today is: just stop buying DRM'd ebooks. Yes, this is a problem if you buy from Amazon and iTunes. Tough. Fucking. Shit.
Just stop it. Stop it and they will eventually stop, too.