I never got to try WebOS, and I really wish I had (I know I can download an emulator, but you can't emulate day-to-day usage).
That said, I'm using a Windows Phone these days, and it's fantastic. No, really. The UI is amazing, and going back to my old Android phone feels incredibly clunky by comparison. I wouldn't recommend one just yet- there's still work to do. For one, third party apps can't interface with native apps- for instance, the Messaging app seamlessly combines SMS, Facebook and Live chat, but I can't hook in GChat. If/when they get that set up they'll have a very loyal customer in me.
I would really love them to put in more apps for the chat[1]. GChat, AIM, etc. Some of this may be up to the developers of the application in question: Google may not allow Microsoft to do the GChat. Google doesn't even supply a Google+ app, nor a truly working web interface for Windows Phone.
I'm using ICS on my Touchpad. It's nice as a tablet OS for a power user, but after using WP7 I don't know how much I would want to go back to Android on my phone. There's just not that much I do on my phone where I need to sacrifice a slick and intuitive interface for the sake of deeper access to the system. On my tablet I need that and am grateful for it, but I'd rather not fiddle with my phone.
[1]I should add, this is a sticking point for WebOS for me as well. Very nice chat app, but no Facebook chat drops it down the drain for me. There's no way to integrate Facebook chat into it without Facebook doing it themselves, and they aren't planning on doing so.
Well, GChat is openly accessible via XMPP, so it's quite possible to do it without Google's permission. The question is whether MS would want to do it, at the risk of marginalising Live chat.
I'd like to believe they've moved on from that mindset, but I'm not quite convinced. Certainly, I'm not sure if they'd want to provide user support for GChat through official WP channels. What I'd love is for WP to provide hooks for developers to make their own GChat XMPP service, and slot it into the OS.
Services as opposed to apps makes a lot of sense for WP, because it's already deliberately non-app centric.
That said, I'm using a Windows Phone these days, and it's fantastic. No, really. The UI is amazing, and going back to my old Android phone feels incredibly clunky by comparison. I wouldn't recommend one just yet- there's still work to do. For one, third party apps can't interface with native apps- for instance, the Messaging app seamlessly combines SMS, Facebook and Live chat, but I can't hook in GChat. If/when they get that set up they'll have a very loyal customer in me.