I have to agree with Wolf on the IK issues in Poser. Although I don't think it is 'broken' so much as it hasn't been touched since P4. A full IK/FK system would open up the animation potential quite a bit (and lets face it; how many newbie animators give up after starting something, switching the IK status, and finding that they have just trashed their past X hours worth of work....?). Just like having a spherical gizmo onscreeen that links to the motion functions of  selected body part would speed up the keyframing process (I hate to think how much trouble morphs would be with that, but basic skeletal motion, and do the fine tuning with the dials would be good. I know the gizmo they added in Vue has sped up manipulations in that app).

The question on the sensor doll is how sturdy is it. If it only lasts, say, 50,000 translations, that might get you partway through a busy year.  And if it disintegrates if it ever falls on a hard floor, well........