Expected performances - as a not so wild guess - of the forthcoming high-end Onyx devices: Geekbench 3 values of 490 single core and 1200 multi core.
Or, +75% gain on single core and 4+ times as fast as current (when all is well).
EDIT: and take into consideration that the Freescale i.MX 6SoloLite in "almost legacy" Onyx devices is almost always choked, always something to process in queue (CPU load almost always > 1)... With the presence of more cores, responsiveness is facilitated as it is radically easier to find an idle actor to serve you.
http://browser.geekbench.com/geekbench3/8466789
EDIT: before I was guessing using other people's input, now I am doing my own direct tests, on presumably similar boards.