Broadwell is the name of the next gen Intel cpu's. end of the year was their aim but they moved back the date (since they have no real improvments)
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they want to recoop some of the money they put into the Haswell series. either way not worth waiting for since you wont see more than 8-10% increase in overall performance.
buy what you need, never wait in most cases.
the next cpu's will always be 6 months away since they want to make profit,
like every sport game which comes out yearly and they try to show what little improvement they have done.