Hmmm
Theoretically, 'laser' swords would be possible. Though they wouldn't be laser- they'd be energy. Could still be red or whatever color you want, but it'd just energy, maybe plasma, contained in an energy field. Look up a Halo energy sword. 

Cybertelepathy? 
Implants. Either traditional radio-wave or similar transmitters/receivers in microchip form, designed to integrate with the human body, and then implanted in people. Alternatively, one could use quantum mechanics to create very real (though they're definitely out of our current technological level) microchips that instantly transmits and receives from one other microchip- a 'paired' set, which would be impossible to block and would be instant regardless of distant. Probably really super expensive too, because quantum mechanics are tough.

Theoretically, anything very not-science could be explained via quantum mechanics. For example, you're describing a roleplay in a universe where the Many Worlds Theory is real; the Many Worlds Theory says that anything that could be does exist in at least one parallel universe. For example, there are universes where I am very, very successful, where I am a girl, where I am a drug addict that rides ponies to school, where I [i]am[/i] a pony, where I have long hair, where I don't have long hair, where I don't have any hair at all, where I'm the last person in the cosmos, where I'm the first person in the cosmos, where I'm writing my fourth book, where I'm writing hate mail, where I'm writing romance poems, where I'm eating a dog, where I'm eating a piece of paper, and so on. 

But yeah, this sounds really cool.