For most of us, I suspect Eneloop is the gold standard when it comes to rechargeable AA cells. These cells meet their rated mAh and are low self discharge. They have been extensively tested and proven over 8 years by many independent tests.
For me, I see some problems with the Boost FP currently.
1) I don't need to see or understand their secret sauce. I just need to see independent videos/reviews where Boost FP vs Eneloop 2400mAh cells are shown in a variety of devices.
2) Assuming the Boost FP works as claimed, the inventor says "Each battery would retail for between $10 to $15, he said." Currently Eneloops can be purchased between $2 and $3 depending on the sale, quantity, etc. Ikea rebrands decent low self discharge 2000mAh ni-mh AA cells as their Ladda brand and they only cost $1.50 CDN each.
I have a Fluke 187 that requires 4 AA cells and only lasts 72 hours. I presently use Eneloops in them. For me to put Boost FP cells in them, it would cost between $40 and $60. The cost alone will not make me buy them. What happens if one cell leaks or I lose one or malfunctions?
If the Boost FP cells were in the same $2 to $3 range and proven to last longer, then it would be a no brainer.
For some applications, if the Boost FP cells last significantly longer, I can see some niche applications where the extra run time would be beneficial.