I have used some PCs, chromebooks, laptops, and netbooks with SSDs. As long as they are not the 1st gen SSDs, then they are great. I have seen too many 1-2 year old (or not even) machines that were bleeding edge with SSD totally fail...
The initial ones were SLOW, and not very reliable. Now, they are larger, lower cost, and better performance and reliability. However, I only see them in laptops. I don't see them in your typical office PC yet. I think that people want to see the 2, 3, or 4 Tb HDD size.... Now that SSDs are available in 2Tb capacity, and costs are coming down, that could help adoption and performance.
My chromebook is amazingly fast to boot, etc, with its 16Gb flash/SSD.
I think that many people will start to use an SSD for their Windows drive, and then install a second larger drive for their data, if they have the need.
For security, an SSD is perfect or a client workstation. For a VMS server the SSD would be great for the OS, but the data typically will still go on a spinning drive...