Firmware 3.41 was an empty update for the most part, with the only true contribution being the PlayStation Store recommendation option, but behind the scenes Sony did make a new, minor enhancement to the system and
this new feature will make downloading future firmware updates quicker and they'll be smaller in size than previous updates.
Hidden away in the firmware update, Sony put a new incremental download patch in place, though the PS3 has always had this type of feature, this new incremental feature will now allow for smaller downloads. Previously, all firmware updates were incremental and they built off each other since the original firmware, but Sony has revised that concept and firmware updates will now only download what is needed from the latest firmware opposed to downloading the entire firmware. Firmware 3.41 only needed around 40MB of information, so the system only downloaded that much, opposed to 200MB of additional information from previous firmwares.
This will allow for smaller updates, faster downloads, and PlayStation Plus subscribers an easier time with auto-downloads. It may not change much in your system functions, but it'll make updating your system an easier process as you'll be downloading less files.