HP outted a spec sheet mentioning a new level video card for notebooks, the MX250. The video card is paired with 2 GB of GDDR5 memory and actually would be the first Turing based architecture to not use GDDR6.
That said, it of course also is not a certainty that the MX250 is actually based on Turing. Currently, it is unknown when the MX250 becomes available, but CES 2019 will be a suitable time for the introduction of some new notebooks.
Nvidia would also be preparing the introduction of RTX for notebooks, including mobile variants of the RTX 2080, 2070 and 2060.