Another plus for solid-state drives in a laptop is that they're less vulnerable to vibration and shock. (Less of a factor in desktops, natch.) Modern disk drives are pretty good in terms of how they're mounted and with features like automatic head parking if the laptop senses too much acceleration, but they're still mechanical devices with incredibly close tolerances that can go totally pear-shaped if something bounces the wrong way. Solid-state drives are also smaller and lighter than disk drives, so you can build a laptop that is too.

Personally, I'd take a chance on them if they were part of a package I wanted. If you're concerned with long-term reliability, keep your backups current - but you do that anyhow, right?