Timeline for 8th Generation Intel Processors in Precision 3000 series?

The 8th generation Intel processors were released last October. XPS lines adopted them late last year, Vostro lines were released with them earlier this week, and Optiplex lines are due to be released with them on May 22. 

Is there any indication of when the Precision 3000 series (fixed desktops) will receive them? I've seen news for the mobile versions, but no indication for the fixed desktop version.