I doubt we will see usage caps in the near future. Verizon has invested so much money into FTTH deployment that they are trying to please their FiOS customers as much as possible and I don't think they want to risk customers jumping ship if they start to enforce caps.
Cable companies haven't invested nearly as much as Verizon and can afford to take a gamble on usage caps. If Verizon does decide to do it, I would imagine their caps being extremely high (750GB for 20/20 for instance) considering how much bandwidth we have to work with.
Believe me it's better to not post about what a good cap would be. I prefer when users just say they don't want caps so it won't give verizon any idea's that a cap is acceptable ever.
reply to jca2050 Being able to say "I have no caps, nothing to worry about" is a definite advantage, when the prospective customer has no idea what a Gigabyte is. Though in that case, they might not know what a cap is either. I expect the caps will never be advertised, and buried in fine print, its up to Verizon to bring up the subject in their advertising.