We have nearly reached a "maximum level" with Up Lighting, and effect lighting. There isn't any need for the lights to become brighter.
What will change with the Technology moving forward is more wireless connectivity. More use of Device Apps, and running everything wirelessly, and connected to your phone or tablet. The tech is already there...it will just continue to become more popular, and come down in price over the next 3 to 6 years.
In a few more years wireless battery operated effect lighting will be introduced and become more popular.
As far as capability of the lighting and brightness...There isn't really any need to improve at this point. It's already there.