new Vue(
    {
        el: document.getElementById("somediv"),
        data: function () {
            return {
                pos: {
                    x: 10,
                    y: 11
                }
            }
        },
        ready: function () {

            this.$watch('pos', function (val) {
                // gets called in 0.10.6 val = {x:5,y:11} (if data is a object not a function)
                // BUT does not get called in 0.11
                console.log(val); 
            })

            this.$watch('pos.x', function (val) {
                // gets called val = 5
                console.log(val);   
            })

            this.$watch('pos.x+pos.y', function (val) {
                // gets called val = 16 (unusable value)
                console.log(val);   
            })

            this.$data.pos.x = 5;
        }
    });