doesn't particular matter if you know what they mean. A sidepanel that can open up at the click of an icon which tells me that 9 cookies were used, and they're set by google and yahoo and bing and 5 sites I've never heard of... that would give a lot of visibility immediately to people. Giving them an option of deleting/removing/blocking right from that sidepanel would
empower people to be able to deal with it themselves without having to wade through scary and non-standard menus. Instead, we get a decade of ignoring this and then EU legislation that forces people to put stupid bars at the top ('we track you with cookies, click here to accept') but does pretty much nothing with respect to user education and empowerment.
We have 'home' and 'reload' and 'back' and 'forward' buttons. Actually, no, my safari doesn't even have a 'home' right now, but a 'share'. Why not a 'cookie' button.
Again, doesn't particularly matter whether you can decipher base64-encoded stuff or not - the average person has no clear way to even understand the number and type of cookie data being tracked, nor an easy way to block/unblock without wading through multiple levels of menus which take them away from the site they're on.
Doing this on smartphones would present a challenge, but is not impossible. Doing this is desktop browsers shouldn't be all that hard. We see the data in firebug - parsing out request headers and showing the cookie data (with block/delete/allow options) in a sidebar panel would not be hard. But it won't have any real impact unless it's something built-in to multiple browsers and we have an education period.
The late 90's was full of "ban cookies! reject cookies! they're evil!" hype, then we all forgot about it for a while, endured the rise of doubleclick and the like, and got legal solutions vs good UI solutions. :/
EDIT: I hit save too quick. I don't think this will ever happen - at least 2 major browser makers have a vested interest in keeping the ad-based tracking economy moving along - any built-in browser functionality which would interfere with that will never fly. I'm talking about Google and Firefox (which relies a lot on Google's wellbeing re: ad revenue). I imagine MS is in a similar boat, but maybe not to the same degree as Google. I can't speaker for Apple's potential for this, but given the webkit tie between chrome and safari, it's probably unlikely as well.