I think the point(s) to intel's new Salt River SSD's is that they are:
A) ULTRA compact being in "Mini PCI" (like a Laptop WiFi card)
B) NOT taking up a Drive bay, PC-card OR Express Card slot
And as the vast majority of notebook computers have an unoccupied
these drives are quoted as being about the same performance as a 5400rpm Notebook drive (one would presume the peak performance of a HDD)
Frankly What I'd use one for is an ultra reliable backup for the OS install
on my notebook and essentially using it as an internal "Recovery" source
That unlike a "factory restore partition" would also back up all my personal setup and preference information... right down to website cookies.
So for my purposes the 40gb drive would be entirely adequate.
But I'm not entirely thrilled with the idea of funding the R&D of their newer products.
I agree platter HDDs are proven, generally reliable technology that can last for years.
SSD's Nobody knows yet.