Just a small list of new/upcoming ARM SOC with vastly improved performance and features. The list below is 32bits but ofc many 64bits are in development.
Some of these SOC is already in device manufacturer production or available.
I particular interested in the Chinese chip makers like Allwinner and Rockchips because I can run Linux on them with ease, also they are more likely going to be included in cheap low-end TV boxes. i.e. Cheap toys for me :D

NVidia Tegra K1 2.3 GHz ARM Cortex A15 r3 or 2.5 GHz Project Denver 64-bit
GPU: Kepler 192 CUDA Cores (quoted 365 GFLOPS peak)
(You can preorder Quad-CortextA15 Jetson development board http://www.nvidia.com/object/jetson-tk1-embedded-dev-kit.html )

Samsung Exynos 5422 4xCortext A15(2.1GHz) + 4xCortext A7 (1.5GHz) with Heterogeneous Multi-Processing (HMP)
GPU: ARM Mali-T628 MP6 OpenCL 1.1

Allwinner UltraOcta A80 - big.LITTLE octa-core heterogeneous 4xCortext-A15 + 4xCortext-A7
GPU: PowerVR 6230 64-core OpenCL 1.x

Snapdragon 805 Up to 2.7GHz quad-core Krait 450
GPU: Adreno 420 OpenCl 1.2

Rockchip RK3288 Qaud Cortex-A17 1.8Ghz
GPU: ARM Mali T760 OpenCL 1.1

MediaTek MT6595 Quad Cortex-A17
GPU: PowerVR Series6

The little Nvidia board is interesting. A little single board computer with a CUDA processor built in.

While it's not a "super cruncher", the low power of the support board means you could build a nice little cruncher (or Steam Box, or Home theatre etc) with something that only draws 20w or so?

Ian

It is quoted sub-10w ofc if you are add a sata drive it will draw more. Comes with Linux and all the tools you need to flash it. In a most basic setup, you probably can run XBMC in the foreground and BOINC on background and leave it on 24/7 without worrying about the electricity cost. You will need to port your own ARM/CUDA version of SETI though.

There are a few post about Allwinner UltraOcta A80 development board also but it is hard to get your hand on it since I can't find any place I can buy it.

New, cheaper, 64-bit MinnowBoards coming out from Intel too. Including GPUs on die. Whether they'll be any use for s@h, I don't know...

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New, cheaper, 64-bit MinnowBoards coming out from Intel too. Including GPUs on die. Whether they'll be any use for s@h, I don't know...

I wonder if they will update the Galileo as well. You can get one of those for ~$50 right now.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
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New, cheaper, 64-bit MinnowBoards coming out from Intel too. Including GPUs on die. Whether they'll be any use for s@h, I don't know...

The Bay Trail range of processors is really going to hurt the ARM chips. The spec looks very nice indeed. It is nice to see open source GPU driver so people can built as they please. I think S@H already has Intel GPU support somewhere.

1 Lane PCIe, SATA and gigabit Ethernet, lovely.

New, cheaper, 64-bit MinnowBoards coming out from Intel too. Including GPUs on die. Whether they'll be any use for s@h, I don't know...

The Bay Trail range of processors is really going to hurt the ARM chips. The spec looks very nice indeed. It is nice to see open source GPU driver so people can built as they please. I think S@H already has Intel GPU support somewhere.

1 Lane PCIe, SATA and gigabit Ethernet, lovely.

I might have to try to get one when they become available -- my Atom/ION Acer nettop died after I'd switched it off for some power-distribution work. Never did get it to run again; I salvaged the HDD, memory, WiFi card and fan from it today and junked the rest, as they are moving us to a smaller office.

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If the memory is compatible it may be cheaper to get a Gigabyte J1800N-D2H or the http://www.cnx-software.com/2014/01/14/60-msi-j1800i-motherboard-features-10w-intel-celeron-bay-trail-processor/ Bay Trail 10W TDP, I am not sure how you going to give the power but their is the picoPSU 60w should more than enough. just a suggestion.