Think of it this way: Steem just adds a little twist to current social interaction in web by enabling you to directly support other people. With voting slider you can determine if you want to just give same old like just like before or actually financially support the other party.

Doesn't mean you have to go in for voting spree for every comment. It's just an option you have available now with Steem, that wasn't there before! Does that add value? If so, how much? I welcome discussion on these questions.