As the first 32GB SSDs emerge here and there, with many companies creating them, it's only a matter of time before we start seeing them reach capacities that rival desktop hard drives. To that end, Samsung is announcing a 64GB 1.8" SSD, which aside from doubling the capacity also offerings improved read and write performance over the 32GB models. These SLC-based disks apparently offering write speeds of 45MB/sec and read speeds of 65MB/sec, which is just about on-par with SanDisk's 32GB model announced not too long ago.
With the cost of flash rising and these drives being quite pricey, all these companies are betting that the demand for flash will increase quite a bit. They are likely correct, especially with the numerous advantages flash brings. With improvements in reliability, the only real disadvantage is price and availability.