[quote]Suddenly Star Trek in 150 years doesn't sound that farfetched...[/quote]
I think that would be possible if we could find enough iron/steel/other materials to make space ships faster and easier.
However, actually exploring space is a different story, with the nearest star being about 4 light years from here (about 5,878,625,000,000*4.2 ~24,690,225,000,000 miles). We would need a way to create wormholes in order to greatly decrease travel time.
But the impulse engine sounds wonderful.
Of course it does, but it'd easily be the most efficient method of space travel! Think about it: Jumping ten thousand light years every second (without any actual acceleration, G's, or relativistic effects because you're stationary but traveling through a fold in the dimension above our own to another point in space), you could cross the known/observable universe in days! And cross our own galaxy in about 15 seconds at that rate! All we would need is some space-time flaws, like domain walls or such...
But yes, that would take a long time to research to successfully produce. Probably hundreds of thousands of years, or maybe even millions. It's a type of technology so hyper-advanced I could only imagine beings who're millions or billions of years evolved and having survived to know how to use it or found out if it's feasible.