Sorry, but the prophecies of a horrendous hike in ebook prices seems overblown.
The publishers are going to use dynamic pricing, so most ebooks will still stay in the $10 or less range. Of course, that doesn't fit the hysterical stereotype of publishers as blood-sucking demons, and the handful of current ebook buyers are used to the flat $10 rate, so people tend to ignore the full implications of the upcoming changes.
I.e. it's pretty much just the new ebooks that are going to cost more. If the average price you're paying is $3, you're probably not buying new books anyway, unless they are direct from the authors, or from small genre publishers that pay squat to the authors and staff.
Ergo I doubt your buying habits will change that much, or that your TBR folder is going to drastically shrink any time soon.