I currently have a rMBP 13 inch that I absolutely love and also the new 12.9 iPad Pro. It is a great combo but it is also overkill for what I normally utilize both machines for. I'd love to go all iPad for the future but I run a program called OOTP that is truly a computer program and need a laptop for. I have my rMBP in my bag every single day and I am looking to consolidate both machines into a new rMB but concerned about performance decreases and giving up the "better" machine. I am not a true tech detailed person so I don't know how big of a performance dip I would need in downgrading to the rMB but looking for some feedback from others that have made this change. I utilize this one program and then of course daily needs such as emails, spreadsheets, and browsing with no true hardcore editing or any other powerful needs from my laptop. Thank you for any feedback!!