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What Is Really Needed For Indoor Navigation?

I have read about many ways to develop Indoor Navigation. The Hardware recommended varies from an IPS system to a Lidar based system, even straight scripts, the use of cameras, Encoders and maybe even a compass. There are simple methods given in tutorials but they are not the "real" navigation wanted.  Total confusion is what I end up with. I can see the validity of each device and even combinations of devices with added safety sensors such as drop off sensor, bumper sensors etc. Sophistication is needed but I end up with Mystification.

My main question is what works, is needed and makes sense? Anyone want to discuss this subject?

I know there are many who want to build the base for an Imoov or their favorite robot build or just get an Adventure Bot to travel throughout the house using a single verbal command. I would.

If Dj wants to do a Hack Night on this subject I think many would be interested.

Related Hardware EZ-Robot EZ-B v4
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I agree with most of these requests. An autonomous robot moving about like my neato without running into a fully furnished home or work place. I believe that any company or individual would benefit from this system on their robots. 

My neato app maps the room and then I can simple use my finger on the app to mark off "do not enter" areas. 

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#47   — Edited
I also like the idea of using something like Azure services to analyze video stream in real-time to detect people moving around the room and or to recognize and approach them.
Yes, I believe a robot able to come when called, random travel throughout the house, perform limited task like take to, fetch recognize a face, basically be a " smart" pet is why and what is desired. Program wise I would like to identify key locations. I pick one then the robot goes there. Self mapping would be great.
As hobbiest we are looking at the same picture. Our techical sophistication level is lower but not by much. Our pockets aren't as deep, but we still want to accomplish the same results. With software development and hardware available here, we could,  though at a lesser degree, do what they are saying.

I'm excited !
#51   — Edited
Reviewing the posts I think I would like to see a navigation system using the IPS and Lidar combination. IPS would be the main control with the Lidar used for object advoidance, and allow the tracking around objects when detected.

With this in mind, I am beginning to modify my Adventure Bot which already has a EZR camera mounted on  it. I am adding 3 ultrasonic sensors around the base and a platform for a Lidar. I will place EZ bits near the rear to allow for the IPS transmitter when it becomes available.

I look forward to updates when they become available.