I did see a piece about those the other day. My guess is it will be along time before you see them appear in anything but Korg products (including Vox amps) but if there is any objective truth to the press release claims, yeah, tube amps could become substantially lighter and more reliable. I'm interested in seeing what happens with power tubes, if anything. That's where the real wear-and-tear savings could be realized, since power tubes fail so much more regularly and predictably.