Good - that's a little more of a discussion starter.
First, the Broadwell chips discussed in the article are not related to the Mac Pro... the
Mac Pro (at least currently) uses Xeon chips, and if the Mac Pro were to use Broadwell, they would be Broadwell-EP (Xeon), which is a slightly differently line of Broadwell chips than that discussed in the article. That's why it has no relevance to the Mac Pro. Broadwell-EP hasn't been released yet - it's expected end of this year/beginning of next.
Second,
Skylake chips that would be used in the rest of the Mac line have already been released (or are being released over the next few months), so those would most likely go into new Macs.
It is conceivable Apple would use the Broadwell chips mentioned in the article in the lower-end iMac, but probably not likely, because again, Skylake has already been released. The reason Apple would
consider using the Broadwell chips for some of their iMac models is because those particular chips include a pretty decent iGPU. But it's probably much more likely they will use Skylake.