Fat arrow scope conundrum

example.js

'use-strict';

// using node v5.7.1

var funcs = {
  speak: function(){
    console.log(this.name + ' says hi');
  },
  name: 'david'
};

var fatFuncs = {
  speak: () => {
    console.log(this.name + ' says hi');
  },
  name: 'david'
};

funcs.speak();
fatFuncs.speak();