I think publishers should mimic the DVD/BluRay model Disney uses. If you shell out the $$$ for the BluRay, you get a DVD and digital download in the deal. That way you don't have to shell out extra cash for the other formats. If you don't like the film, you can give the DVD to someone else (or the download code) who might enjoy it.
If you buy a hardcover, then you should get a code that allows you to download the ebook version when it's available. That way, even if they put off the ebook availability for 6 months or so, readers don't have to shell out the extra cash for the digital copy. They can give the hardback as a gift and keep the digital or just keep both.
I've yet to see someone stand in line to have an e-book signed by the author.
If you buy a hardcover, then you should get a code that allows you to download the ebook version when it's available. That way, even if they put off the ebook availability for 6 months or so, readers don't have to shell out the extra cash for the digital copy. They can give the hardback as a gift and keep the digital or just keep both.
I've yet to see someone stand in line to have an e-book signed by the author.