there are no benefits just like you said either 3.41 or 3.55 play the games maybe in the future there will be a newer firmware (whenever that would be) but for now... you can either just play the older games....
or sell your ps3 for an xbox and flash it and get all the games for free (have to pay for online though) but it is a more cheaper and better solution
2/16/12 Being an active member on this site was cool hell I enjoyed it. But now I gotta move on from the PS3 scene hopefully in the future things will get better for the scene and I wish the devs good luck. So in this sig Goodbye fellow members I wish you all the best!