The "upgrades" refer to changing the hardware on the first generation robots to that of the newer ones. In principle that would improve tuning performance; in practice, it's fairly major surgery as most if not all of the robot hardware and electronics would have to be replaced. Replacing this with the 3rd generation technology would be exciting; here is what that does in addition to what our first generation can do:
Chameleon Tone TechnologyTM delivers iconic guitar sounds without digital modeling
The pickup switch toggle is also a knob (“Piezo blend”) that, when turned, determines the blend
of magnetic and Piezo pickup sounds
Companion software includes Gibson Chameleon Editor for creating custom sounds and tunings
available at Gibson.com
Software is compatible with Mac OS X and Windows XP, Vista, and Windows 7
Robot Interface Pack
It's a lot of stuff! On the one hand I would like to preserve my Gibson Original Robot in original condition, because it's more valuable that way. On the other, I would like to try these new features to see what they can do. So it's a very personal decision!
An '08 SG Robot would be 1st generation.