Not to sound sarcastic, but, why would we give you an idea to make money off of us LOL? If someone had that idea, they would already be doing it.
The only way you can make money here is to actually build something we can use, and make it competitively priced. Jayrob is a good example. He creates stuff that mostly no one else creates, and stuff we can use.
Having an idea and having the means to fullfill that idea are not the same. Building hosts for the lasers was a great idea, but not everyone can do that. Obviously Jayrob was able to fill that role, but I am sure he was not the first too look at a flashlight and say "hey, that would make a cool looking laser".
I think you could simply rephrase his question as... "What could you guys use, that you don't already have"
Something I have been thinking about but don't have the means to create would be an actively cooled host, not using a TEC.
For example, simply using a finned heatsink instead of a solid heatsink, with a fan behind it inside the module that simply pushed air across the fins, allowing for a much cheaper(cost, and power consumption), albiet less effective, cooling method allowing you to get even more out of your laser modules.
The heatsinks are all about heat dissipation, right now with the solid heatsink designs it works but it is far from efficient. If they had some way to create airflow within the module through the fins of a heatsink you could drastically increase your cooling capacity for a portable module by only having to power a fan which has very lower power requirements compared to a TEC module which has rediculous power requirements.
You would have to have input air vents (probably in the tailcap) and output vents (probably at or near the front lens), but you wouldn't have to push all that much air through for it to be effective.
Downsides are obviously space, and the additional power draw. You also have to run wires past the fan to the Diode though there are several possibilities for accomplishing that.
Needless to say that all still requires time, effort, and ability to draft, test, and produce a product that would meet those needs. But if this host would allow a powerful constant-on portable laser without a duty-cycle required I suspect you might have some members interested at reasonable prices. This in its self isn't a ground breaking idea by any means, but simply improving upon already existing and functional products. In fact I am positive this isn't even a new or unique idea, but I also haven't really seen anyone introduce products for this yet either.
If he could develop such a product it would give him a niche market to work with where he would not be competing with anyone else here as far as I know (granted I'm fairly new). This particular product I see being most viable for all of the beastly 445nm 1w blue lasers running around there right now. Lasers like the S3 artic handle the cooling by simply creating a massively huge laser with a huge heatsink, but if you could actively cool you should be able to get away with a much smaller host and still have a constant-on duty cycle.
