I know the RasPi has a video input connector, although the software only supports the Foundation-sourced camera accessory.
Do any of the others have video in?
Also, saying an ARM quad-core is four times as powerful as a RasPi is like saying it's 10 times as powerful as my desktop workstation... maybe true if you're comparing against the fastest ARM processor in any of the peripherals (I think there's one in the SSD), but clearly missing the point. The RasPi ARM core represents only a tiny fraction of the compute power in the Broadcom VideoCore chip.
The BeagleBoneBlack I've also evaluated, and saying it has "quite robust OS support" is misleading. Several important peripherals, including the SGX PowerVR GPU, still have no drivers for any of the available OS distributions.
Many of the boards shown in this article are Evaluation Boards (EVM) for the microprocessor manufacturers and as such they are made in small numbers, often at a great loss to the manufacturer in order to entice customers to buy their Micrcoprocessor chipsets.
The other components on the board, and 'their' manufacturer such as the Ethernet PHY, DRAM, Flash and/or Power management end up getting a 'free ride' for their silicon being on the board since many people copy EVMs precisely.
Of these boards the manufacturers place a 'cap' on the number of boards that can be purchased by a single company or individual to stop them using it in a product due to the losses made in their production.
The Rasberry Pi board is made by a non-profit charity, with private funding. Real Companies have to make a profit to stay in business, so this board is undermining the industry as a whole.
I don't really see the relevance of this article. If you want to use these boards in a product you hope to make for a long period of time, then be warned, you'll have endless issues in a couple/few years time when these boards no longer exist.
I would put put the Lillypad and other Arduino compatible systems in a different category. They don't have nearly the capability of something like a Beaglebone. However, the Arduino has been perhaps even more important to date. I think it's done more to expand the accessibility of MCU-based devices than anything else beyond the MCU itself.
The original Beagleboard has been just as valuable in the inexpensive full SPC arena. From what I've seen that board really started the movement that is written about in this article. There were certainly small SBCs before the Beagleboard, but making it open source (as is the Arduino) was brilliant marketing and set the Beagleboard far above anything before it.
Blog Doing Math in FPGAs Tom Burke 2 comments For a recent project, I explored doing "real" (that is, non-integer) math on a Spartan 3 FPGA. FPGAs, by their nature, do integer math. That is, there's no floating-point ...