Bart,
Treasure those tools, even the ones you already own versions of, as I'm sure you will. Be assured, that you are NOT alone in dealing with aging parents. My father is still relatively spry, though his COPD is slowing him down quite a bit. He's not a woodworker, but he IS an inveterate tinkerer. He keeps buying tools with the intent to pass them down to me someday. Case in point, he upgraded his drill/driver set to the then-new Dewalt 36v Li Ion kit. I got his old Ryobi kit and he's been having a ball with the Dewalt, so I frequently remind him that I want him to wear that sucker right out. (my thought being if he wears it out, he's been Around to use it well for a long time), and that I'm in no hurry to receive the tools etc...
Yes, there is some angst involved in taking them over from him, but look at it as continuing the stewardship of them, if that makes any sense. All the best to you and your family.