Should you list acceptance of an abstract to a prestigious conference on CV when unable to attend due to personal reasons?
As it is a peer-reviewed conference, I think it is OK to mention it the CV. 

I am not sure about your particular conference, but in such conferences the biggest step is to get accepted (extended abstract/paper) and you did. So you did the job, they liked your idea and in normal situation you would present there.

It can happen that you are not able to present and you cannot find anyone to do it for you. However, you met all the requirements to be there, so it has its place in your CV.

If you want to be more correct you can mention the abstract as well because not everybody can know if the abstract or whole paper is required.


  "A genius solution to an insanely difficult problem". Conference
  Everybody Wants To Attend XXIV, May 2014, Prestigious American
  University (accepted abstract, unable to present)