A few days ago I saw something about Frommer's, (owned by Google), going digital except for their Disney guides. I can't remember where, it may have been an Ingram or Baker & Taylor e-mail. This is enough for Harry McCracken to herald the end of printed travel guides in Time Magazine, Print Travel Books Are Dead, and There's No Good Replacement
Now I see at The Guardian that Lonely Planet has been sold by its owner, the BBC, as Kevin Rushby reports in The death of the guidebook will open up new worlds . It's worth reading the comments on this one for some interesting back and forth. Some say that the Web does listings of restaurants & hotels better, but that e-book versions of travel guides leave a lot to be desired.
Still, it sounds to me like another groan of tectonic plates shifting in our print collection. Fiction is bursting at the seams, but non-fiction seems to be withering away in very definite areas. Still thriving vigorously in print: cookery and knitting!