I doubt I'd ditch my G6 for anything anytime soon. I've been very happy with it. Definitely would never be for the Note 8. The price of the Note 8 is literally more than double what I paid for the G6. Not to mention I'd lose the wide angle camera which I love.
V30 looks awesome, but not different enough to the G6 to make it worth spending the coin. Not to mention I like the physical size of the G6 better.
Samsung has basically forever priced themselves out of my consideration with their latest phones. It's not that I can't afford them (I buy new phones every 6 months or so usually), it's just that there's sooooo much better value out there from other manufacturers like LG, Oneplus, Huawei, HTC etc. The Note 8 will cost $1300 CAD in Canada before tax. That is insane. I could buy an LG G6 and a OnePlus 5 for that price and still have money left over.
Samsung has become the Apple of the Android world but without Apple's admittedly excellent post purchase customer support.
/rant