Angular change detection process repainting the dom

I'm learning about Angular change detection process and I'm checking the Chrome dev tools, I see strange behavior.

My plnkr to demonstrate the behavior: http://plnkr.co/edit/cTLF00nQdhVmkHYc8IOu

I have a simple component view:

<li *ngFor="let item of list">{{item.name}}</li>

and the its constructor:

constructor() {
    this.list = [{name: 'Gustavo'}, {name: 'Costa'}]

to simulate a simple request I've added:

// simulating request repaint the DOM
setInterval( () => {
  this.list = [{name: 'Gustavo'}, {name: 'Costa'}];
}, 2000);

If you noticed, the array list receives a list equal to the initial value. Let's imagine when Angular checks the values in view in change detection process we have a code like this:

if( oldName !== name )  { // ( 'Gustavo' !== 'Gustavo')
 // update the view
}

But the values are the same, why angular REPAINT THE DOM every 2 seconds.?

But if I mutate the object, the REPAINT does not occur

// simulating request there is not repaint
setInterval( () => {
  this.list[0].name = "Gustavo"; // no repaint because it's the same value
  this.list[1].name = "Costa 2"; // repaint
}, 2000);

You can test this with the plnkr link above.