Wow, Polygon's own sources are saying some things including 6 TFLOPs..
Those sources also told Polygon that one of those new consoles will be over four times more powerful than the current Xbox One and that the announcement at E3 was triggered by, among other things, a faster-than-expected timeline for Sony’s own upgraded PlayStation 4. The other console, a slimmed-down version of the current hardware, will also be getting a redesigned controller.
Tom Warren at Polygon sister site The Verge reports that the console will be "40 percent smaller than the current model and will likely include 4K support," which will be for video content specifically, though the existing Xbox One models include scaling hardware to output games at various resolutions. Our sources also confirm that this will be the smallest Xbox ever made.
Current plans have the smaller Xbox One scheduled for release this August. Pricing for the system has not been finalized.
The other console, codenamed Scorpio, is unlikely to be released until late 2017, according to Polygon's sources. It will likely be announced in the next month, though plans are somewhat in flux.
Power is a primary concern for Microsoft with Scorpio. The PS4 has remained a constant leader over the Xbox One in this respect, with games on the platform usually running at higher resolution and a higher framerate on the PS4 than their Xbox One counterparts. Microsoft is determined to end this narrative.
The Xbox One is believed to operate a peak target of 1.32 teraflops, compared to the 1.84 teraflop performance numbers attributed to the PS4. Meanwhile, per documents secured by Giant Bomb's Austin Walker — and corroborated by our sources — the PlayStation 4 "Neo," at approximately 2.25 times more powerful than the PS4, is likely to have a peak performance number of 4.14 teraflops.
The current performance target for Microsoft's Scorpio is approximately 6 teraflops.