I don't think anybody expects this to be sata priced just yet, but at least it's better than previous 4.0 devices and Maybe will follow the 3.0x4 path. From quick check 4.0 is 2x the price of 3.0 right now, so if its like ~1.7x that would be nice. I just wonder if it will me 5$, 5% or even more than the current offerings.4.0 NVMe will become cheap in due time. It took 3-4 years for 3.0x4 SSDs to go from expensive novelty to price parity with SATA at least for more budget-friendly ~2GB/s models, 4.0x4 will likely be similar for bringing 4-6GB/s SSDs to the masses.
Give it 3-4 years for the "early adopter" tax to die off and the more likely outcome is that 3.0 SSD controllers will go extinct due to how little material and design cost difference there is between 3.0 and 4.0.From quick check 4.0 is 2x the price of 3.0 right now, so if its like ~1.7x that would be nice.