As the creator of bluz, I can provide some answers here.
We are also evaluating the new hardware and what it means to bluz. The primary focus of these boards at their launch will not necessarily include generalized BLE support, which would mean they could not operate as a gateway solution for bluz until that is available. However, they do run the Nordic chipset (same as bluz) and can act as a gateway from a hardware perspective, so we would expect to be able to use them as gateways for bluz at some point. As we have expertise in supporting the Nordic stack and BLE in general, it is possible we could even accelerate the BLE features on this new hardware. These are all things we are currently looking into.
I can say that we absolutely do not plan to leave our customers without a plan forward. Our hardware and firmware are still fully functional today, and you can expect they will still be functional years from now, so the hardware will continue to be supported. While this new hardware is certainly exciting (I placed my pre-order within the first hour!), it also won’t be available for months, so things will continue to operate normally for bluz. As we figure out how this new hardware fits our story over the coming months, we will be sure to keep everyone in the loop.