Um, spoilers.

Here's a side by side comparison of the opening scene from the pilot and last night's corresponding scene. So it looks like things are the same but different -- this isn't the reset, it's a whole new timeline!

Damon Lindelof and Carlton Cuse discuss this in-depth with EW's Doc Jensen here.

If that's too heady for you, Videogum has a recap-in-pictures that might be more your speed. It's awesome, so look at it.