Yes, great suggestion. It's currently implemented in the beta Android app, just need to get registered with the Apple Developer Program and get iOS working.
Because Curio saves client-side, it opens the app and renders the page briefly though. Not sure yet if there's a better way to do it.
One personal use case that I'd love to see supported (when you get your mobile apps implemented) is the ability to add articles via the 'share' shortcuts. I get mailing lists with links, and I don't want to stop to read an article while clearing out my inbox. So if a link looks interesting, I use the 'share' feature to add it to Pocket, and then I'll go back to it later -- without opening my browser.