I have not come across any such projects which support offline payments. It could be a thing in the future but trying to place physical POS machines in places could be the hardest part for the project as it needs physical resources and space. If at all someone comes up with a decent project for this, its surely going to make a mark and go big in the market.
Yea, so true. But isn't this what bitcoin is about, helping more people, not just tech savvy guys like us.
And I agree, if someone figure this one it's gonna be big.