3500 books on a plane!

I am now the proud owner of a brand new kindle.
What a profound change to the reading experience. I don't think the world of story telling has undergone such a change since Gutenberg invented the printing press! I must say that having heard about the e-readers for some years I have decried it in all quarters as the nemesis of the printed book. I extolled the virtue of paper and ink saying it was irreplaceable and bemoaned that anyone could think an electronic reader could compete with a few hundred years of  beautiful tactile books. However, I now think (along with many others) that there is room for both hard copy books and electronic books.
Just as the music industry had to cope with the onslaught of itunes (and similar  formats) and the film idustry to cope with dvd releases and the like, so the publishing industry is finally coming to terms with the modern electronic way of getting reading material to the public. In this day and age of instant communication it was inevitable, I suppose...
I really like the travelability of the kindle - you can take 3500 books with you on a plane! - and the ease of buying the books is superb ( although that is perhaps partly the point).  And as a writer, electronic publishing  is yet another market in a world of ever decreasing opportunities to get traditionally published.
I've got to admit, I don't know anyone who has purchased an electronic reader who regrets it.
In my humble opinion it simply adds to my reading experience as I still read old fashioned books too.
What do you think of the explosion of e-format books and e-readers?