Re: Why the obsolete interface?
Because SCSI is not obsolete when it comes to enterprise gear, it is still used in the majority of high end storage arrays due to it's reliability and high speed. If I wanted to sell lots of these things, I would put it in a form factor where I could easily punt them to the big NAS and SAN storage companies, e.g. EMC, NetApp, HP, IBM, Sun. All of which use SCSI disks for their fastest storage.
Interestingly, a technology like this would significantly impact on the performance for Storage, at present a major limiting factor on NAS and SAN gear is the "seek time" or the time it takes to move the disk heads before a read or write, NetApp goes some way to get around this with their WAFL (Write Anywhere File Layout) technology, in which NetApp writes data to the closest free space, instead of moving the heads to the next contiguous space, NetApp then write a pointer to the data in a table called an inode table.
The traditional way to improve performance on storage is to use many smaller disks so that you increase the number of spindles and therefore your capacity to read and write sequentially.
In the case of SSD there are no disk heads to move, so the performance for other storage vendors will be massively improved while the benefit to NetApp will not be as great, it'll be interesting to see benchmarks when SSD's become used in the mainstream, especially how it affects the SAN vendors.
Also it may well be possible to gain very high performance from a smaller array, once the bottleneck of the disk heads is removed, although this will depend very much on contention introduced by the bus technology which is being used to connect the SSD's to the storage controller and the speed of the memory itself.