I hate to sound elitist but I avoid built in speakers for guitars and keyboards. Also, Apple has already changed the iPhone jacks once, rendering loads of accessories incompatible with newer phones. I'd pass.
that link is like a kickstarter or go fund me type site. I think it was 300 or 400, but if you wait til they come out, I believe it will be 800. I would not pay that for one of those, actually I don't think I would get one, unless maybe if I could take it on an airplane or something like that. you could rock out and ignore people, maybe even a giant family gathering and when uncle bert comes over and wants to know what you have been up to for the last 19 years you could just strike a big fat open e chord and say, "I WANT TO ROCK!!!!"