Firewire is gone from the MacBook because:
- The chipset doesn't support it (apparently)
- It's mainly of use to creative professionals, who'll be better off with the MBP anyway
Matte screens are gone because the whole design of the MacBook/Pro would need to be changed. You ever seen clear, matte glass?
Apple wanted to iPhone-ify the entire product line, so they designed the new laptops around that goal. They could have come up with some unibody design that allowed for a different kind of bezel and matte screens, but then the aesthetic would not match the iPhone.
I'd like to think that glass could be subtly laser-etched to diffract light and reduce reflections. If not, Apple needs to go back to the drawing board. And they will. This glassy look is a fad that will pass. After enough people get eye strain and grow tired of constantly dodging reflections, they'll welcome the "new" and "improved" non-reflective screens that will inevitably supersede these mirrors that are being forced on us now.