It has a motion sensor? I'm not aware of that, only gimmick I noticed was
force feedback. It does work, however it seems to be buggy.
About Intel graphics: you don't have to buy a whole new PC. Motherboard, CPU
+ cooler and RAM is all you actually need. I spent 150, maybe 160 euros for
all that and the components are pretty good. Boards with integrated Intel
graphics are almost always cheap, but that doesn't mean they are bad. Mine
has high-quality solid capacitors and a so-called OC-switch, if you wish to
overclock without going into BIOS. You can flash the BIOS from USB, boot from
a USB BIOS, etc. Not at all a low-end solution.
Intel graphics work very well with Trisquel, but the performance could be
better. My card is supposed to support Direct X10, but it has no where near
the performance of usual Direct X10 cards. It's more like a Direct X8 card or
something.