Technological wonders

Too often I post about the merely routine, and this post is much the same; but it is a great thing that one can read scans of rare historical source texts on one's phone. I'm not sure if it is great in the sense of really very useful, or great as a gimmick, or great as a symbol of the sharing of old knowledge on a table constructed with the new; or just great in the grand/cool sense; but it's great nonetheless.