Windows 10 looks pretty awesome. And if you like me down graded to an android phone from a pretty good old windows 7.8 phone you'll realize that the voice recognition stuff on android hardly works. I use a nexus 4 which is too new to change again, but I hate that I can't reply to texts with the headset. Yeah I know there is probably an app out there and probably a mode. I didn't figure it out. Win 7.8 phone did it automatically and switches off when you turned the headset off. So the Cortana feature looks even more amazing to me. One note that I've realized the voice rec on the latest version of Android works acutally pretty good now. It's been like 4 years. And still doesn't work great with the headset. All apps on android are scary since they want all kinds of access to contacts, messages, phone. Oh boy, I can't install anything because I'm too afraid of what it might do with that access. I only really trust the native stuff.
What I wonder is how they plan to monetize free windows 10 as a service. I'm not going to be happy if I find it's another yearly fee like Office 365. I searched forever to find a legit activatable copy of office 2010 to avoid that.