Essentially, what's happening here is that we've reached the point where the next Windows 10 update (Redstone 4) is nearly due, so therefore close to finalized, and thus Microsoft has begun work on Redstone 5 testing, releasing an initial build to Insiders who've previously chosen the "skip ahead" ring.
"Starting today - Windows Insiders who opted into Skip Ahead will now start receiving new builds for RS5 which is our next Windows 10 release". The latest Windows Insider Preview builds for testers also include some emoji design updates to align with the standard emoji characters. If the limit has been reached for the number of users testing a feature you will get a notification and be able to join when more slots open up. The company is nearing the release of Redstone 4, which is yet to have an official name, and plans to ship the update to the public sometime in March or April of this year.
Among other changes, the major change that the new Windows 10 Insider Preview builds is certainly the Ultimate Performance scheme that is initially exclusive to workstations. The new scheme is touted to eliminate micro-latencies that are linked with the default power management techniques. If you value the lifespan of your components and don't want to tax them too hard, however, it may be best to avoid heavy Ultimate Performance use for the time being.
Since Ultimate Performance mode cares little about energy efficiency, it probably shouldn't come as a surprise to hear that it won't be available battery-powered notebooks.
A look at past Chinese New Year celebrations in Cleveland (vintage photos)
The year 2018 meets the element Earth and therefore is the Chinese Earth Dog Year. Its importance in Chinese culture is same as that of Christmas in the West.
Ultimate Performance is not now available on battery-powered systems, but this could change as the feature is rolled out.
Ultimate Performance mode is rolling out in Windows Preview Build 17101 for Windows 10 Insiders, so we should see it roll out to the live version of Windows sometime in the next month or two.
It goes without saying that the new power policy would require the system to consume more power while exploiting the hardware to its fullest.