I have to disagree a little bit. I am an illustrator/graphic designer, and I'm currently using a 23" late 2005 HD apple cinema display, which is 100% matte. At my last day job I used a 2010 27" iMac. Yes, the reflections were frustrating. Yes, it was an unacceptably mirror-like. But it was infinitely more accurate to print with the colors. On my home display it's virtually impossible to see near-black and near-white colors. I can't tell you how many times I've made something in photoshop that I thought had a white background but actually had 1-2% grey in it and I had no idea until it printed or until I opened the same file on the 2010 iMac instead.
In addition it will always be impossible to get deep blacks or truly deep saturated jewel tones on a 100% matte screen.
Ideally I'd want something in-between and just not work directly next to or across from any windows and get some curtains. Apple claims the rMBP is a 75% reduction in glare from the standard MBPs. While that is a bunch of malarkey, I do think there is about a 25% reduction in glare. At least it's a step in the right direction, and I wouldn't want them to go 100% matte anyway.
Conventional wisdom says that consumers are lured by glossy and pros want matte. I think it's actually the other way around. General consumers want to go outside and to cafes with their laptops and iPads. They want to watch a movie during a bus trip without being distracted by reflections. Professionals want deep blacks and a wide spectrum of accurate colors - even if they have to make sacrifices like dimming the lights and putting up curtains.