You are not giving the hardware designers much credit and nor apparently noticing the progress made by the latest low-power high-performance GPUs for mobile devices. I'm quite sure technologies for powering off unused parts of devices will migrate from CPUs to GPUs.
I don't think so. Dual GPU systems that can switch seamlessly are certainly somewhat of an oddity. It's certainly true that certain segments of the market will always aim for single GPU systems. However, if you want to combine very low power consumption but also powerful graphics in one system, dual GPU solutions will remain the solution for the forseeable future. The reason being that: 1) integrated graphics cannot compete performance wise with discrete graphics. This will always be true.2) Discrete graphics cannot yet work as power effectively as simple integrated graphics. It is likely this will remain so for a long time due to this being a hard thing to do.3) The need to combine both low power graphics and high power graphics in one system will not vanish into thin air.
There is no "need to combine both low power graphics and high
power graphics in one system." There *is* a need for
high-performance graphics that consumes low power. The current
dual-GPU solution is a hack.
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