Day 8: Rejected Ideas

As I have been working through the possibilities and ideas for this series of 7 Days, 7 Gadgets, I have had to reject a lot of ideas.  Many were just a bit silly, but quite a few had already been done before.  Here are a few:

• Combined washer/dryer  This would be super useful to just throw a load in and then take out dried clothes.  Space efficient, but not in-line with how most Americans do their laundry - they do a bunch at a time and want it done NOW!  Also, its already been done.
• Floating electronic pool chemical monitor  Already done.  But arguably, not well.
• Automatic wall painting device  Done, but not in a compelling way.  Lots of innovation available.  Frankly, routine use would be a key part of the innovation.  For use to be routine, it'd have to be more cost-efficient or provide some other meaningful advantage (lower insurance rates due to avoidance of people on ladders).
• Many other previous ideas.  I went back through my posts and tagged all that could have qualified.  I really wanted to use some of them, especially for Day 7.