Quoting from the email, "This will be the phone that you want to use, and will use every day." For this to be true, these are some of the key things for Mozilla to focus on:
* The responsiveness of the UI.
* A good camera (at least 5MP).
* A decent amount of memory to hold multiple apps (in dormant mode) and reduce startup times of recently used apps.
Running Android apps may be a good interim strategy while apps targeted and optimized for Firefox phones are developed. But this assumes that the phones can run them well. Otherwise it would just backfire completely, leaving Firefox phones as useless devices.
I can't wait for a well performing Firefox phone that's widely available (even if that means costing a few hundred dollars or equivalent)! It'd be great if Firefox can come to fourth place or (gasp) third place in the mobile OS wars.