What is going to come after SSD's? now that they are coming down in price, a newer technology should be faster and better than SSD's right?
What already has a specification is Sata Express, which allows up to 16Gb/s or probably about 2.5x as fast. The real limit to SSD speeds currently is the interface. If you notice, most of them all hit 500-550MB/s, with none going over that. That's just because of the interface.