And I'm going to wait on this one. If they're going to delve into the fitness category, I'll be looking at Garmins (of which I have several, albeit older ones with no smart watchy stuff) which are more durable (my $DEITY, does the Pebble get scratched up), go forever on a charge, and I'm willing to bet just plain do the job better because Garmin has been at it for a while.
Given the hurdles on iOS that Pebble can't seem to overcome (for which they are not entirely, if at all, to blame), I'll also wait and see what Apple has on tap. Apple has some shortcomings to eliminate, maybe they'll do that next round.
It's not because I'm unhappy with my Pebbles, I love my current Time Steel. But if I'm going to spend money on a watch that does what Pebble is currently advertising, my options open up to include established competitors in that space. I'm not willing to bet real money that Pebble can outdo those competitors right out of the gate. So I'll wait until it hits retail, see what it really does and what the experiences of others are. Maybe I'll get one, but it's not guaranteed like it was for previous versions.