As with most mining gear, the primary beneficiary of these gadgets will be the sellers them selves (i.e. Bitfury and 21 Inc.). Buyers won't make a dime on them. I'll furthermore suggest that 21 Inc did their "miner" as much to help them garner $116M in Venture Capital (VC) money. Hard to know what all they did with that money, but I'll bet it was a small sliver that went into the Raspberry Pi "Bitcoin Processor". They don't actually call it a "miner" in the classic sense.
I wonder if either one will do as well, or as poorly, as the Antminer R1.
The R1 made a decent U3 controller after crazy guy's firmware. I think the RPI kit was priced where they knew they would not have to make many. I know I bought a R1 to play with. But the 400 dollar price tag on 21 Inc... made me stay away. It did give them a item they could show off to investors... it no doubt helped in that area.
Everyone is real secretive they might have a great idea to do with all the money they have in hand. But we won't know till they launch it public or it leaks. And leaks don't seem to happen to much anymore NDA's are pretty tough.