No-one really knows.
It is uncharted territory, but if you look at the panic - value of £ and shares value fall, parties offer deals on more devolution, leaders of parties to miss Prime Ministers Question Time and fly to Scotland to promote No vote (smacking of the Quebec 'Unity Rally'
http://en.wikipedia.org/wiki/Unity_Rally)
There is a danger here to the vested interests: from the Pope to Obama, the Scottish people have been urged to vote 'No' ; the stewards of the selfishness/thoughtless comfortable compliance that has been successfully indoctrinated into people for many generations do not want to see dangerous precedents: fragmentation might spread to other rich countries and questions that are easier contained in larger blocks might emerge, such as why nothing really has been done about poverty in the world: why we have become increasingly dependent on fossil fuels despite knowing the dangers of dependency and increasing global warming threats, and even in the pampered US and UK, why is the divide between rich and poor growing.