Primarily because I have the Gear 1 and never really used the camera. The only regular use I got was with the Vivino app and in restaurants and the like there often wasn't enough light to get a good shot. Not high enough quality to be a serious camera, so not worth the extra $$ to me.
Now, having had a few hours to play, I am impressed. Email handles well. I like it better than gear 1 already, but apps! needs more apps. Facebook and evernote, Watch styler. But its faster, more snappy, colorful, etc. I like relocated button to light it up, easier to reach and press than the side button.
My S5 shipped today, so tomorrow I will be on new toy overload.
Edit: Oh yeah! Calendar! More than one day, you can scroll side to side through the days.
What I am looking for in a watch is quick access to lil bits of information, whats that new email. In my job, its easy to be considered rude and inattentive checking my phone the middle of proceedings, the watch allows me a glance to see who/what the email is, the text from my wife. The pedometer and heart monitor are fun, not my focus tho.