Sold State Drives are still not yet the default hard drive in most less expensive PCs and laptops. While their prices is dropping many manufacturers charge a significant premium for an SSD drive.
The question is, are they worth the price? Consumer level SSD drives can be as much as 20 times as expensive per gigabyte as their old spindle drive counterparts. Most of the significant kinks have been worked out of this newer technology and are often far more reliable than their more mature competition - spindle drives. The speed gain is undeniable as a SSD computer can often boot in 1/5th the time as a nearly identical system with spindle drives and the apps load in a blink of the eye.
While the laptop and tablet market grow the PC market is shrinking but they still have many advantages. PCs can have multiple large hard drives holding many terabytes of data. PCs can have the fastest video performance for gaming. PCs are still cheaper than laptops for systems similar specs - processor, memory and storage. PCs are easier to upgrade. PCs make it easier to attach many peripherals - mice, keyboards, monitors, printers, scanners, label makers, thumb drives, etc.
More and more people are taking their laptops from work to home or from their home with them on vacation. A very fast and very light laptop is what most people want these days. You can buy a boat anchor on sale at best buy for $500 or you can buy a very fast and very light laptop with good battery life for about $1250.