*sigh*
It is true that blasters probably won't be used, heck there's a chance that we might not even use directed energy weapons at all (although strangely in another thread Lucien said that it was strange that the Halo humans still use projectile weapons in the 26th century, even though that's very possible). However, we can most definitely produce a handheld weapon of some sort that would surpass that of blasters. Will it be called a "blaster"? Probably not. But we CAN invent more powerful weapons than a blaster. If you still disagree, then let me ask you: how advanced do you think our handheld weapons will be in, say, 2000 years? Please give a description of how powerful they could conceivably be via 2000 years of advancement.
You have yet to explain how AI is impossible. To think that we cannot invent AI at least at the level of a battle droid (whose "intelligence" is laughable) in millions of years is not realistic. Let me ask you: how advanced do you think AI will be in a million years (if we survive that long and are still advanced)?
We don't yet no if "anti-gravity" is possible. If it is, then we can make one. If not, then obviously we can't, however we can make devices that function similarly to repulserlifts.
So in billions of years we won't have the tech to make a car fly? Now will they actually become a common transportation method? Probably not, due to many negative factors of the sky being filled with flying cars, but we do have the potential to make one. We probably won't (or at least won't make them widespread), but we can. They are not "beyond comprehension".
Who says that it's light or plasma? And how do you know that we can't figure out some way to control light/plasma in some strange way?
It could be some strange new element that scientists invent.
Oh, and true, we obviously won't actually use lightsabers for combat, that's ridiculous. However, it isn't entirely far-fetched to say that they are possible. Are they? Maybe, maybe not, but so say that they may be possible in millions of years is not "crazy".
Oh, and Lucien, you are a hypocrite. Please don't bash me about "bashing" (ie being a bit sarcastic) others, when you go out and call people idiots and come up with strange logic to support it (oh the Empire wins cause they simply divide their small forces around the globe and attack all of the many nuclear countries at once and win EASILY, and of course I'm ignoring something called the OCEAN, their lack of transports, their not-unlimited supplies, air strikes, artillery strikes, the nuclear nations' NAVIES, overwhelming numerical disadvantage, and many others, but who cares? Later: hey, it's a spite against the Empire! How dare you!). Then, when I come up with a large, LOGCIAL argument to support my logical conclusions, often times you ignore it. Tell me: when have I EVER started bashing someone FIRST before they did? I'm waiting...