As for the Boston mockup, keep in mind, it's probably not running on actual Intellistar 2 hardware. Granted, the IS2 should theoretically be able to look like that, but I think they want to keep the IS1 and IS2 as identical as possible for some reason.
This could probably be a whole separate discussion in its own, but I've always wondered what the maximum capabilities of the IS and IS2 hardware are. I'm assuming the IS2 is more powerful that the IS and can probably handle the animated backgrounds and such. But it just confuses me to see these fancy, flashy mockups and then have the actual product be sub-par. I'm pretty sure you're right in saying that the Boston mockup was not running on IS2 hardware, and I remember the mockup of the IS2 they made before it ever came out was not on IS2 hardware (I think someone mentioned After Effects). So, to me, that sounds like the IS and IS2 cannot handle that much "pizzazz," if you will.
The proof of concept videos are typically made in a graphics editor like adobe, etc. Its one thing to make a pretty mockup but entirely different to program and code it for a working product.
The IS2 can certainly handle a lot more than what its doing now in my opinion but thats by design. It's built to have a very long lifespan and needs to accommodate future unforeseen graphic needs. Also remember you don't want these machines running at 100% power all the time. Efficiency is important for longevity. It's quite amazing if you think about it... some of the machines have been running with fans blowing, drives whirling, etc for 10 years!! That's what I call a quality product.