As far as I am aware, most developers are ignoring the patent. The theory is that there will be too many developers for sega to chase.
Imo, patenting this sort of thing is a bit stupid.
If I remember correctly, a few years back sega won a court case against Atari for the use of the camera buttons (that featured from virtua racing onwards).
Nintendo patented (or applied for) the sanity effects seen in Eternal Darkness, this is another example of a BAD THING.