My opinion is that it's still too early to tell. I'm putting them in the same boat with Mozilla's new mobile OS and Ubuntu's new mobile OS--they're late to the game, but they're already starting off far more consumer-friendly and less open-source and developer hostile than Nokia did with Maemo and MeeGo. That alone gives me some more hope--but after the experience with Maemo and MeeGo, I also have learned not to rely on hope and hold my breath. They still need to compete with Android and iOS for market share to make themselves viable but then Linux had to fight the behemoth that was Microsoft and has been steadily coming out on top year over year. It might be not a fast climb to the top for any of these. That's my position--it's basically a good start but what will REALLY count is how they listen to customers and community along the way while maintaining a successful business model. For my perspective--as I've said all along, I'll gravitate to whoever gives me the most of what I want. Openness, flexibility, trust, compatibility/library and support are big for me and the people I work with--I like Android (especially CyanogenMod for its AOSP) but I still yearn for something better. So far, I've not seen it. Not even in Jolla.. but it's still early days--but I remain skeptical until I see more evidence that they're not just going to behave like Nokia did.
I seem to recall some carriers and vendors (ie. Verizon and T-Mobile among others.. http://www.ubuntu.com/phone/carrier-advisory-group) already trying it out--and I know you can already install it on many Google Nexus devices (like my Galaxy nexus). So it seems like it's already getting some traction. Maybe I'm wrong?
What have I told you about being rude to people? Wait until I get you home, you naughty boy! I hope you've got your vest on.