Rumors suggest that updated MacBook Pros appear later this week, most likely on Thursday. The new MacBook Pros will feature larger glass trackpads than those found on current models for greater flexibility and perhaps for more complex gestures. The lower-end models will have 8GB-16GB solid-state drives to house Mac OS X system files, and will also come equipped with a regular hard drive. This will offer the benefits of SSDs - instant on and super fast performance - while also providing lots of room for heavy users’ files. The idea of separate flash-based storage for system files is not a new one. Intel's "Turbo Memory", in 2006, offered similar functionality. The new machines will be up to a half-pound lighter than current models and there will be five different SKUs.