I hope they will offer some with clear dome, diffused LEDs are dull, well, they have to, because they are not designed with lightsabers in mind, but applications where they should signal something to people looking at them with the naked eye. Not something I recommend doing with the LEDs we usually use in this hobby for LED string blades...
I'm just thinking about how to do the armpit trick with 4 leads...GND and VCC are OK, but data-in and data-out must go diagonally to the next stage. But I fully trust the imagination of this community.
BTW, I tried today the 144LED/m type in a transwhite TCSS blade, it looks very even for me even without any additional diffusing, I definitely do not see the single LEDs like with the 60LED/m type. It's very promising.
Hey, I also would welcome smaller modules like what we use for PLI with the same technology. There definitely a single line drive would be a clear advantage as well.
Or maybe a saber hilt similar to Erv's superb Tron disk, lighting up from inside before igniting the blade. OK, maybe I am getting carried away.