I can buy Coke cans at Costco for around 35 cents/can or close to 3 cents an ounce. Why would Keurig think that I'd want to pay 5+ times more for the "convenience" of buying a big expensive machine to let me "make" coke at home!?
And those capsules look big (which is probably because there's so much sugar in soda, they can't make them tiny. Probably about 1/4 the size of a 8 ounce can of coke.