I suspect that this will be something that will be included in the later projects of Dash Evolution (which is really a road map that stretches well into the future)
The latest generation D-Wave 2X system has an operating temperture of about 15 millikelvin. The processor and parts of the input/output (I/O) system, comprising roughly 10kg of material, is cooled to this temperature, which is approximately 180 times colder than interstellar space! Most of the physical volume of the current system is due to the large size of the refrigeration system. The refrigeration system used to cool the processors is known as a dilution refrigerator.
'Rose's law' for quantum computing mimics the conventional 'Moore's law' paradigm seen in semiconductor processor development
For the past 8 years, the number of qubits on D-Wave's processors has been steadily doubling each year (see figure 10). This trend is expected to continue. To create processors with numbers of qubits up to around 10,000, the current fabrication process can simply be scaled to add more qubits in the same way that they are arranged currently. To go beyond ten thousand into hundreds of thousands or millions of qubits will require processor redesign, but there are certainly ways in which this can be achieved and it is not seen as a fundamental obstacle to improving the hardware.