Ok, this is not exactly "Future" webOS gadgets but at one point it time it looks like they were. On January 2nd, Dieter Bohn wrote an article for the Verge titled, "The lost secrets of webOS" that is a very interesting read. Dieter reveils gadgets on the planning board of HP before Leo killed the entire webOS project. In the article he reveils future gadgets code named Twain, Mako, Sapphire, & Embark.
The Twain is an interesting piece of hardware which looked to be ahead of its time a bit as we are seeing tablets like this now.
Dieter also reveils that the iPad 2 is what scared them all off. It was thinner and lighter than the Touchpad. had they rode it out, who knows what webOs could have been today.
If you are a webOS fan, take a moment and read the article: http://www.theverge.com/2014/1/2/5264580/the-lost-secrets-of-webos