Sadly laptops are always behind in the manufacturing queue when it comes to knew technology.
I'm excited that Zen 2 is coming out on 7nm, but at the same time my mobile phone is already good enough in energy efficiency, and I don't expect real practical speed increase for the 5nm version.
Having said that, the very first users will be high end servers. It's no accident that IBM were the first to demonstrate 5nm wafers a few years ago[1], because they'll use them in their top of the line POWER chips. Those chips have incredible single thread performance, but also incredible prices (and apparently very low yields). If you're the sort of person who wonders who would pay money for that, then you're not the target customer :-) (Disclosure: I now work indirectly for IBM)
[1] https://www.ibm.com/blogs/think/2017/06/5-nanometer-transist...
Don't the smaller transistors also have higher leakage? I thought that below 10nm scaling down further would not give power benefits.
But we're not yet at the point where power density increases as fast as transistor density.
Little of your phone battery goes to the CPU. It's almost all screen and radios.
“The design cost for a 3nm chip is $650 million, compared to $436.3 million for a 5nm device, and $222.3 million for 7nm, according to IBS. These are “mainstream design costs,” which means one year after a given technology has moved into production.”
The new nodes will only be used where the design costs can be recovered, which is mostly consumer and server farms AFAIK. Basically anything using the current best nodes will use the next gen nodes.
Also, graphics cards, server processors, and possibly now also automotive stuff.
Right now you can get a 10nm Intel part in a laptop but not for the desktop.