Not yet, I'm guessing we won't hear anything about Surefire's plans until the shot show in three weeks. Personally I'm hoping the L4 won't be updated for another 6 months or so............. But that's because I just bought one and I'd like to get some use from it before an upgrade comes out.
Edit: Oops, I read the question as "has anyone heard anything about....." In regards to the actual question. Probably. I think they're currently working on an improved L5 so I'd imagine an updated L2, L4 (and maybe even an L7) will follow relatively shortly after. We'll know for sure soon enough.
No. The deeper and wider reflectors on the L5 and L7 make them more throwy than the L4. The L4 is a really impressive flood light, and while I'm excited to see it upgraded, I hope it will retain it's current beam pattern.
Same here, the flood of the L4 is what really attracts me as well
I'm sure the increased output of these new emitters will help with room clearing, and not just for increased runtime. hehe..