I thought that Todd said somewhere that if a npc who is a trader or a blacksmith dies...a family member would come in its place?
I know Todd is a little liar but still....

Yesterday I fast travelled to Riverwood and there was a dragon right next to me...sitting on the roof of the traders house....

After I killed him I found out that this bloody dragon killed the blacksmith and his wife.

Now my question is will I ever be able to see a new blacksmith in riverwood???

Well some jobs get replaced but I'm sure there are some that will be empty.

We also can't talk to giants and basically can't get close to them like in some pre-release gameplay it was shown.

Todd is a bad boy!

True. i've even heard some questgivers can be killed, completly closing that questline off. I personally love this.. It creates a world with CONSEQUENCES... You can't just go murder anyone you want or let entire villages get destroyed unless you are willing to accept the outcome from that decision or mistake..