Don't know where you "heard" that, but as has been discussed repeatedly on FOG, there has been no announcement of a new impact driver on the horizon...nor any pending plans for one...and that's from Festool. Of course, that could be Apple-like secrecy.
Though I feel that there is probably one in development, there has been no public info anywhere to that being a fact, and even if one WAS to be released in the summer, it would be a long haul before it arrived for sale in North America. The BHC and PDC's have been sold in Europe for nearly a year now, but are still not released in NA.
Let us hope for the best. In the meantime, I continue using my Makita cordless impact, and hoping to replace it with an 18V Festool at some point.
Cheers,
Frank