The more I think about the word brick possibly refering to a modular system, the more my imagination runs wild. How's this:
Perhaps we'll start to see the screen and keyboard divorced from the laptop, changing the whole concept of mobile computing. Not unlike the desktop concept, you choose your screen, keyboard, CPU "brick", and neatly attachable port/connector "bricks" from a few different options. They all lock together firmly when you want to use the system as a laptop, but you can also leave bits at home when you don't need them...AND (this is the best part) you can upgrade modules independently.
So whenever you upgrade your processor, you don't have to upgrade the screen and keyboard too. Want BlueRay? Fine, buy the BlueRay brick. Want a thicker keyboard instead of the chicklet one? Fine, buy the "classic" keyboard option.The difference between this and a desktop system would be the emphasis on portability and interlocking parts.