The size and the pricing of the units are going to be the things to watch. Size in so much as they may not lead to smaller drive units - but more capacity in the same traditional 2.5/3.5 space. (ofc they'll use less volts too)
Speed-wize, it should always make u giggle that as far as these things claim to be and sell for, u can buy a cheap pc with cheap memory that can write to it's memory quicker than an SSD. The tech vS pricing doesn't compare.
An Intel DDR3->IDE controller and a bank of DDR3 'should' be a whole lot quicker.
But that's where price and redundancy comes up. RAM loses its data as soon as it loses its power, something I would not like when my os and apps are on there. The articles states the new SSD's would be "much more cost effective" than the old SSD components, certainly making it a better option than a seperate DDR3 controller with 16*4GB sticks in there. Which is what you would need for a fashionable os drive.
And as in the drive's size... I'm not looking for much more than 120GB. My OS doesn't get much bigger anyway, and I don't mind data being a bit slow.