For fanless aficionados, the most coveted CPU this year is definitely the i7-6700T. With 4 cores / 8 threads at 2.8 GHz (up to 3.6 GHz) the i7-6700T brings the best of Skylake, and a very small 35W thermal envelope.
35W CPUs fit inside small chassis like Akasa Euler or can be easily cooled with fanless CPU coolers, and most dual tower heatsinks in passive mode.