What sulu said, + I consider Pyra a notebook replacement (for most cases), just like I use N900 as notebook replacement, nowadays (+ as a main phone).
The plus of Pyra is that it's going to fulfill the notebook replacement thing *much* better than Neo900, and phone functionality is nice bonus, that means I won't need to carry a "dumb phone" with me. B'cause, really, the notebook functionality on the go in my pocket is *much* more important than phone-like ones - for the latter, one can carry ultra-lightweight "dumb"phone with battery life exceeding anything that "smartphones" or "phablets" offer, sometimes by order of magnitude.
Now, many major things for notebook-in-pocket replacement - like connecting to external monitor/tv - are natural on Pyra, while remaining "maybe" (and requiring some hooping through the flaming loops) on the Neo900.
Last but not least = this post wouldn't be complete without mentioning that - the "minor" fact that Pyra comes from people that did successful projects in the past is "the"*thing too, for me. Neo900 leadership have a background of scorched earth, burned bridges, rage quits and unfulfilled promises. IMO, this marks the difference between "promising project" and "vaporware".