Macbook Pros come in 13, 15, and 17-inch displays. I've used both 13" and 15" MBP's and I find that 13" is a little too small and 15" is a little too book. So what I would like to see is a 14" MBP, which presumably will have more screen real estate than the 13" and more compact, lighter than the 15". Think it would be possible to convince Apple to jettison their 13" and 15" formats for a more slim, lighter MBP? With the release of MB Air and plastic MB in 13", there seems to be less rationale for a 13" MBP as well. If you travel, the 15" MBP is too large (& heavy) behind a coach seat in airplanes, which may be a reason enough to get MBA. With emergence of ultra-light notebooks, it is quite possible that 15" and 17" notebooks will eventually go the way of dinosaurs and woolly mammoths.