I was just looking at the SATA wikipedia page and there isnt a single mention of what will follow SATA 3. I coudlnt find any concrete evidence that SATA 4 is anywhere beyond the early planning stages. From this i can take it that any follow up offering faster speeds will still be quite a few years away. But unlike previous generations of SATA drives, SSD's are already pushing up against the limits in top speeds, and can only presume that they will continue to get faster with each generation. So where do SSD makers go from here? For marketing and genuine performance reasons i doubt many SSD manufactures would be happy to stay in the 500-550MB/s range for years and years. PCIe is the obvious first choice, but it has disadvantages. 1. Its more expensive to make as you need the board and the extra chips needed currently(particularly an issue for smaller capacity and lower end drives, not so much for the bigger ones) 2. We are used to having anywhere from 4 to 8+ SATA ports on a motherboard taking up very little space, and the drives themselves sit in the otherwise empty area of the case. But PCIe takes up alot of space on the board, and generally most boards will only come with 3 or 4 slots, and if you have a double wide GPU that will often leave you with 1 or 2 left for everything else to plug in. MicroATX and smaller varients are even more effected by the lack of expansion. My ATX board has just a single PCIe slot free right now thanks to my GPU taking up 2 and my network card using one, so it would have to sit right under the GPU, which will block airflow and is far from ideal. I suppose you could use Thunderbolt, especially if it gets up to its supposed top speed of 10Gb/s, with fiber offering even higher speeds in the future. But since its an active cable it will always be expensive compared to SATA on that front, and it will be a long while before we see more than 1 or 2 TB ports on motherboards. Advantages though include power transmission and future development. PCIe SSD's have their place in enterprise already, but we have yet to see any suggestion that the consumer market is going to migrate that way, and it may always remain a very high end option for those willing to pay very high prices for absolute speed. Or will most consumer SSD's just be happy to sit on SATA 3 for years? Top speed wont change but at least that might encourage controller makers to improve random read/writes and IOPS instead (not that these are really lacking in current SSD's, but its an area where they could improve without being blocked by the interface).