I meant to respond to this but forgot. This is would be a factor of power supply quality and voltage regulation, as well as advances in engineering with the bulbs(p-vip). If you remember in the hdr duo review they state that theres 0 bulb flicker and excellent uniformity.I see no fluctuation with my light source. I do not buy into, there being a big advantage to the image, just because it is laser. Laser just dims slower. I owned the RS4500 for a year and now own the RS3000. Would love to have a blind shootout where people try to pick the laser projector out. Use the RS3000 and the VW885. Both calibrated and brightness matched. Would need to limit the content so that you did not have fade to black or real dark content, to give away which is which. Show one and then immediately the other. I think in that type of setting it would be very hard to tell which is which.
On a w1070, which has the cheapest lightest switching supply possible, I cleaned up the power with an autoformer(automatic voltage regulation), a line noise suppressing isolation transformer(140db common mode, 70db traverse mode, reduces 6kv spikes to 6mv), and a quadrapole cable(low inductance, counter ground, filters line thd as well), and it made a massive difference in the stability of the bulb as well as the dynamic dimming of the bulb, much more uniform image in blacks and whites, less flicker, and smooth pumping instead of stepping with the dimming.