Total newb question? What does the "r" stand for in rMBP.
Im on my MBP all the time still trying to figure out the ins and outs of the thing, I guess I had no real reason to get a Mac but I needed a laptop for general purpose but so far I love my iPhone 5 and MBP.
Im going to but iPhone 5s and sell my current 5 which is been cased since day1, but thats a different story
The r stands for retina (likewise, the c in cMBP stands for classic to refer to the MBP with the optical drive and no retina display).
And as long as you're happy with your purchase, then it doesn't matter what comes out next. Just use it until it no longer does what you need it to.