Intel's 8th Gen Core desktop processors are now available, including the very first 4-Core i3 ($117.00), the unlocked i3-8350K ($179.00), and the very first 6-Core i5 ($187.00).
At 65W and 91W TDP passive cooling is achievable but will require top-notch cooling solutions only, like Nofan CR-95C or HDPLEX H5. 35W chips are not expected until early 2018.
Update: AnandTech and TechPowerUp reviews.