I am myself working currently on the Arduino sous vide project using an Arduino Uno R3 micro-controller but I do have other IoT project ideas in mind like building a remote control for smart appliances. I'm always on the look out for the latest and more powerful IoT development board solution and the latest IoT board on my radar is the RedBear Duo which is launching to market in early 2016. I'm excited about the Duo for my next IoT project because it has both Wi-Fi and Bluetooth Low Energy built-in as well as the Broadcom WICED SDK development platform. which means I'll be able to do low-level tweaking.
RedBear Duo is compatible with Arduino IDE, Particle Web IDE and Broadcom WICED SDK develoment platforms, as well as Javascript. Also, the guys behind RedBear are partnered with Particle so the DUO comes with access to all of Particle's cloud services. The DUO will feature a STMicroelectronics ARM Cortex-M3 microcontroller operating at a frequency of up to 120 MHz as well as embedded memories (1MB internal flash and an 2MB SPI flash memory). The Duo will also come with a small baseboard called RBLink with ST-LINK/V2 for programming the board, and 8 connectors compatible with Seeed Studio grove modules.

What I like the most about the DUO is that anyone who is already working with a Particle Photon IoT board can easily pick up the RedBear Duo. It also allows for both Classic Bluetooth and Bluetooth Low Energy (BLE) which is definitely the future because of low power consumption. The idea of being able to power a device with a tiny coin cell battery for days on end really appeals to me!
By the way, if you missed it check out my other articles 64-Bit 3-Watt Super Efficient Computer The Size of A Hand and the NFC cloning card tool the size of a credit card.