Samsung already have PCIe based SSDs and have been mass producing them for mainly the ultra book and laptop market for a while now.
They do however have a new PCIe based SSD that they debuted recently but it is very much so an enterprise product. You can get it in a 1.6TB capacity with 3000MB/s sequential read speeds.
http://www.xbitlabs.com/news/storage/display/20130717231259_Samsung_Develops_Enterprise_Class_S SD_with_3000MB_s_Read_Speed_NVMe_Interface.html