Re: I just replaced the HDD in my laptop with...
The solution you really need for a single disk laptop is a hybrid that gives you some of the performance that SSD offers whilst retaining the cheap capacity a spinning disk gives (in fact a 1TB 'SSHD' is on eBuyer for £47 currently, so cost isn't a differentiator).
And this is really the crux of the interview isn't it? SSD technology will be used to provide high performance, low capacity functions whilst spinning rust provides the cheap cheap capacity.
As with everything I'm sure eventually a 9-dimensional quantum nano-cube will appear that will blow them both out of the water but I suspect that we'll retain the current paradigm for a while as yet.
I mean I'm still sending offsite, long term storage out on reels of magnetised plastic and I've been being told that tape storage was dead for years now*, which is odd because there are lots of people selling large robotic tape libraries and we recently saw reported a new record achieved in tape density so it's clearly still relevant. And look at Veeam back tracking and adding in tape support.
*mainly by people trying to sell me backup solutions that don't have the technology to hook into tape drives.