Agreed, while things like this are great for developers most end-users won't bother with hardware solutions that involve opening the PS3 and a lot of soldering as it isn't worth risking damaging the console... they will just wait for a more user-friendly solution to come.
I think the reason the original JailBreak devices were so popular was because they were plug-and-play without opening the PS3 and also at the time Custom Firmware wasn't available either.
I'm certain it will be a solder solution. If it was USB/Solderless it would have been hacked long ago. This is going to work like Infectus or Progskeet or the old XBOX1 modchips, where the chip responds to the CPU's bootup request for BIOS and and inserts the CFW into the system from its own NOR/NAND instead of the one on the motherboard. That way you can install OFW 3.70 for new games and CFW 3.55 for homebrew. It's a step in the right direction, but still locks us out of all games that are 3.56+ that can't be hacked.
This post will look at the different DATE-CODES that are present on the casing of a PS3 and if that DATE-CODE relates to a console version that can currently be downgraded from 3.70 to 3.55 using dospiedra’s V2 downgrade or a FAT console alternative.
The principle behind DATE-CODES is simple: the first character represent the YEAR, and the second character represents the QUARTER of that year it that console was manufactured.
DATE-CODE of “XY” would mean the console was manufactured in the “Y” QUARTER of YEAR “X”. Simple right?