What are your actual usage conditions and expectations?
I consider Pico projectors to be a joke. They aren't bright enough for any serious use, and their resolution and optics are weak. If you ever go by a Brookstone, they sometimes have one running and on a 24" screen, it is generally a very poor image. This is because they just aren't bright enough to be usable in the condition that people typically dream of using them.
That is, most people want them for portable presentations.
Since most presentations happen in a room with uncontrolled ambient light, you don't get the 100% dark rooms as shown in your two example videos above. That's just not the reality of what most people are thinking of. They are thinking of recreating a nice boardroom projector with something 1/100th the size... and that's just not gonna happen yet.
If you have a 100% dark room like the example videos above, then good for you. Go ahead and get one of those Pico models with less than 100 lumens and enjoy.
But, reality dictates that a normally lit conference room needs no less than 50 lumens per square foot after calibration, which typically (for boardroom projectors) means about 80 advertised lumens (or more) per square foot of screen space.
Do the math:
3M MP225 - 32 lumens - Less than a 1 square foot screen in normal boardroom lighting. About the size of an iPad screen.
AAXA P2 Jr. - 55 Lumens - Just about the size of a small laptop screen.
Of the two, the AAXA is a widescreen projector which is a much better choice.
There are some micro projectors which can give you a few feet of diagonal right now in a normally lit room and deliver with 1280x800+ resolution.
Here's the list, and the only list, of projectors which I consider worth the slimmest margin of consideration:
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The Optoma ML1000 realistically should be able to deliver a 62" diagonal image under normal boardroom lighting without a problem.
Wishing for a Pico projector which can deliver that same light output is nice, but the technology just isn't there yet. You also have to consider the poor optics, sharpness issues, etc. which are often associated with these types of projectors. They continue to be something I would call a 'toy' instead of a serious workhorse product, but they certainly have improved significantly in the past three or four years to the point where the better micro projectors can work as replacements for standard projectors in home theater on smaller (80" or so) screens as long as full 1080p resolution isn't demanded.
There is a new 1080p version just coming to market which is worth consideration for the home theater folks.
Still, at $1,000 for a quality unit, there are many excellent widescreen traditional lamp based models which are far brighter and cost closer to $500-$600 which leaves money for a replacement lamp or two and will last several thousand hours on each lamp as it is.
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Just some thoughts to consider.