I am struggling along on a 2006 iMac that has been a wonderful machine, but is getting awfully slow and prone to beach balling. It is time to update and I was planning on waiting until Haswell came out but from everything I have read it is just going to be a processor speed bump that for what I do (basic office use, minor video processing etc) I will not need or appreciate. I know everyone says to wait if you can and buy now if you have to, but I honestly am looking at the recent spec changes to the rMBP and wondering if it would be just what I need. I am concerned about the disk space, coming from a 2.0 tb iMac, but even a bump to 1 tb wouldn't make that much of a difference to me with. I guess my overreaching question is are we going to see a technological leap with the next gen Macbook? Did that leap occur with retina and now we are just going to see refinements? I love my iMac and will be stoked if I see 5 years out of the Macbook.