From what I've seen, GPUs and CPUs will be doing the minimize our power and footprint thing while gaining more performance.
After the next batch of consoles gaming engines will start utilize more cores and system RAM which will lead to bigger and richer environments.
OLED should be coming into the picture as a consumer usable product besides phones. TVs, PC monitors, ect.
Wireless technology is looking at a leap in speed. A huge leap, rivaling hardware in speeds and getting closer in pings.
I think "flash based" storage is going to become a bigger part in regular computing as GB/$ is decreasing and reliability is increasing. People are starting to figure out exactly how much faster an SSD is over their regular HDD. Less heat and less power usage means companies are looking at SSD tech too. I know for certain the POS industry is, more specifically NCR and Aloha based machines.
On that note, I don't think 3 years but maybe 5 years there might be a breakthrough in large storage technology. I can't say for sure but I think it may be possible in this decade that HDD storage will be replaced with something more feasible. That is stretching a bit as I'm on limited info there.
Taking a step further in storage, I think the optical disc will be taking the way of the DoDo soon. Game systems made them back in the day, and I think modern game systems will break them. Then again, I could be wrong as it's totally 50/50. 2 new consoles based on BD would mean the mainstream adoption of BluRay.
We'll have to see. Everything on my end is speculation besides game engines and CPU/GPU tech.