Electronic Monographs

I have not kept up with the developments in electronic academic publishing, so I was a little surprise to see a new monograph from Columbia UP, Jennifer Langdon-Teclaw's Caught in the Crossfire: Adrian Scott and the Politics of Americanism in 1940s Hollywood available as an e-monograph. The press's website says a print book is coming down the pike, but list only hardbound. I wonder if this trend will open up more room for (relatively) narrow historical monographs. I think that would be a worthy accomplishment.