Actually, I mostly agree, despite going in thinking I wouldn't. Girl Talk is terribly boring live. There are many better, more creative artists in the EDM world. Araabmuzik as mentioned, RJD2 is a genre bending turntablist/synth junky/live performer, Pretty Lights mashes buttons on a monome and plays live with a drummer, and I think The Hood Internet does much better mash ups and has a better live show than Girl Talk (though they don't do the instrumachine thing so much).

I don't think I fully agree with 'the assumption that electronic music is the future'. It will be part of the future, but analog/traditional instruments will always be around, and will always be a significant portion of what music is created and what music is listened to.

Instrumachines aren't necessarily new, I'd even say the original electronic synthesizers of the 60s and 70s fall into the category. The just evolved into things with keyboards so they kind of got lumped into the 'instrument' category. I was glad you brought up turntablism, another example.