I got the first 15" MBP Retinas back in June of 2012 when they came out. It was a terrific upgrade over my 2006 MBP of course and it's been solid for the past couple years. My only question is when/if I should consider upgrading. I usually have 2 schools of thoughts here: Use my high-end laptop for as long as physically possible (last time was 6 years) and then flat out buy a new years later. Or upgrade periodically, selling the old laptop for more cash as it's still relevant and functional, and spending only a little bit to always have the latest and greatest. My experience over the decades has been that you'll spend the same amount in the end doing either methods, but with the later you're always going to have a speedy machine, but there's a hassle in selling and then buying new machines. So, is it worth it? What will the differences be with MBPr release this year and my 2012?