After the iPhone 4s...I would only assume that the new Macbook Pro's will be slightly slimmer, no optical drive, and a speed bump. To speculate otherwise, will cause many a huge disappointment!
Jenny
Well, I think we can all expect something else at this point. For the following reasons:
1. Over 100 different ultrabooks are going to be released in 2012. We will have 15" ultrabooks, and ultrabooks which are also tablets. Lots of different products and great designs. Too much competition for Apple.
1.1. Asus is about to release its Zenbook Prime. This ultrabook will have a 1920x1080 IPS display which reviews are saying is much superior to the screen found in MacBook Airs. One of the versions of this ultrabook will have a dedicated video card.
1.2. Sony has managed to put a standard voltage Core i7 inside a 13" laptop (the Vaio Z) which is even lighter than a 11" MacBook Air.
2. Retina Displays are coming and Apple can't wait anymore. If Apple doesn't adopt them, somebody else certainly will.
2.1. These displays are already available from suppliers, and they cost only US$ 100 more. Just waiting for someone to put on a notebook. If Apple doesn't do it, somebody else will.
2.2. Windows 8 is going to be released in October (probably) and it will support high resolution displays. It's just a matter of time before we see the first high-resolution Windows laptops.
2.3. Mac OS X Lion already supports Retina Displays and OS X Mountain Lion will support them even better. That's obviously for a reason!
3. Not too many rumors, but there are solid leaks. Bloomberg published an article citing a reliable font.
I think we may expect something else from Apple this year. The competition is very aggressive, and Apple will fight to remain at the top.