To be honest in 8-10 years I can see a very small Switch compatible console perhaps with a low latency wireless display feature instead of dock doing great numbers. It will be cheap and low performance by the standards of the day but perfectly fine as a portable. At the moment Switch is bulky with low battery life but I think it may take something like 8 years to transform that performance into something that would fit into a tiny console with long battery life. It's really more about the business relationship with Nvidia and if they can get a good price later on. If Nvidia plays its old games of trying to screw over its business partners then maybe Nintendo will have to abandon the Switch software platform and come up with something new in order to save costs.
We simply don't know at this point enough information to make a solid prediction. The between xbox one and ps4 seems an easy prediction to make now but there are many other factors that will come into play later on that we just don't know about now.
