I'd love to see the people who want steam keys also point out WHY they really really want one despite not having bought one.
So far, only very few people (around 5, give or take a couple) have managed to specify why they would want a Steam key with actual reasons. The streaming bit is one such reason, the counting of total hours played in your Steam stats is another. Doesn't matter whether I think it's a miniscule benefit, at least it's there and the people who want this know what they want.
The rest is 188 pages is people who don't know how Steam works ("I need that key to get the overlay to work!"), or who have either unrealistic expectations ("It will get Workshop integration!!").
For me personally steam just feels better. I like to have my games in one place (207 games on steam) and trying to stick whit that, and all this features that steam have (community hub, hours counting, etc) they are maybe small but if you have chose to "have it" or "not have it" what you will chose?