If you are a self-published author, you may want to consider publishing via both options. I just remembered a survey I did with US-based readers when I published my book. I initially wanted them to just be on print versions to hold a special offering for the books.
However, 80% of the readers say they rarely read print books nowadays and most of them consider continuing the books via Kindle.
Though, one answer struck me the most.
One guy said, it's not up to us to decide the definition of "reading." It's up to your audience.
So, if you're thinking of publishing your book, it's better of have it either way because the end goal, aside from profit, is having your books read by your audience. Whether it's on kindle, android or live book, they should have the option to choose.