I have a 2012 15" MacBook Pro Retina. Upgrading to the new one doesn't feel like it would be much of an upgrade. My current notebook does everything I need (ST3

I have a 2012 15" MacBook Pro Retina. Upgrading to the new one doesn't feel like it would be much of an upgrade. My current notebook does everything I need (ST3, web, music). I think when MacBook Pros have 4K screens, or better yet, OLED screens, I will upgrade. I'm thinking that will be 2018 or 2019.