Probably only of passing interest here, as the usual hardware/software packages discussed on MR aren't very useful for chess publications; but at least it's another publisher going the software route.
Everyman is offering chess ebooks for sale in Chessbase format, which allows for interactive reading (shuffling pieces around the board, hopping through variations etc.). Chess ebooks have a lot of advantages over chess pbooks, so this should be a successful effort.
There are
sample chapters available for anyone interested.