they may not be a big features for you but to others including me it clearly is. It was the reason why I returned my Pebble months ago.
I mean what does the pebble really do beyond notifications ? It really is the most basic of basic when it comes to features. I wasn't satisfied spending 100-200 on a watch that mainly just gave me notifications. I might as well just spend 200 more and get a WHOLE lot more utility from an Apple watch IMO.
People will definitely be utilizing the call features for quick calls when their hands are full or phone is out of reach or just for convenience. Do you know how many phone calls are just quick 5 to 30 second calls ? I think you're overlooking so many "convenient" moments where full hands, distance phone, or just plain convenience is gonna find people using all these features CONSTANTLY throughout their day to pay for things, answer calls/texts, find info via siri, etc, etc. and you still haven't acknowledged the wealth of possibility from the app store.
For those who actually see where these features will benefit their tendencies can clearly see where an Apple Watch is clearly another league from the Pebble. Saying it doesn't have any big features in comparison is like someone saying the original Iphone didn't do much that THEY personally needed beyond their flip phone. Like those people who still own them and say " It makes calls , that's all I need". Okay to each their own, but to others there will be ALOT of useful features in this beyond what a Pebble can do.