Along with other products that Asus is demonstrating at CES 2014, the Z87-Deluxe/SATA Express motherboard is set to be the first to feature the SATA-Express standard. It is particularly impressive considering that it seems that the SATA-Express won't even be standard on the next-generation Z97-Express chipset.
The SATA-Express connector aboard the motherboard will allow for transfer rates of up to 1000 MB/s. The SATA-Express connector is different from the older SATA connector, though.
Up until now, there haven't been any SATA-Express drives on the market, so for testing it is likely Asus' 'Runway' creation.
We have yet to hear when the Z87-Deluxe/SATA Express will come to the market.