Ran into this problem for the first time this weekend. I anticipate having little or no trouble eventually getting to the book I purchased, but this BS of publishing a "list of devices" you can read on is pointless, since Kobo makes apps for all the listed platforms (including Desktop).
My problem apart from the labor costs of the usual repugnant DRM crap, is that I really don't like Kobo's Android reader software. I tried their web-based read-anywhere platform exactly once and it was an absolutely unacceptable POS. I like my glo well enough, but that's hardly the point.
Irony? the non-EPUB title I bought was titled "Without Copyright".