On Stack Overflow (and related sites) you have:
Meanwhile on Stack Exchange sites you have:
(Minus the hastily drawn arrows in MS-Paint, of course.)
Personally I think the latter looks better, which is why I bring this up.
I see the precision argument. Though I'd argue that at a quick glance while scanning a list of questions precision is less important than more easily comparing adjacent questions. And that the k next to the number makes it clearer that that question has had more views. But that's just me.
I created a Greasemonkey script to force the k where I like it, and I guess one thing to look at is that Stack Exchange sites haven't had to deal with questions with nearly this many views yet:
Which personally I'd call an edge condition, and still prefer the k next to the number. But I understand others seeing it differently, and I think Pollyanna, and in related previous questions, Jeff, made a good point about maintaining precision.