Is it worth upgrading from the launch 2015 MB to a 2018 model? My specs are: 1.2 GHz Intel Core M 8GB RAM 1600 MHz DDR3 Intel HD GPU 5300 I have an LG 5K monitor which looks amazing! In comparison, my 12" MB looks very pale in comparison. Is the screen on the latest 12" much better? Am also thinking we may see Touch Bar introduced on the 12" which I'd really like. Did anyone else go through this upgrade?