I use gmarks in firefox so I don't use my "bookmarks" in firefox anyway(I wouldn't want to have 1000+. So it would be cool if that place would be where my cell phone-favorites comes from. I find a site, so I bookmark it to watch it later with my cell phone on my way to school. Or the other way around, sometimes when I try to fall alseep I watch youtube videos while in bed, would be cool to just bookmark it for later, then watch it if it was goo on my desktop comp later.
But I would agree it's more of a convenience thing then _very_ practical.