Hybrid systems have a much higher failure rate than disk. Also the idea behind these drives is efficiency and longevity. The will work with systems to lower seek and load times of applications, but the performance will will stay par with other drives out now until the pipe technology is changed.
Yes you should wait for the hybrid hard drives, they should be at CES in January. Ive seen them in action and they are AWESOME. games load some much faster. the model i saw in use had a 8 gig flash moduel on it an, windows vista will also be optimized for this after the drives release.