Mixed feelings here.
(a) The hardware looks great, really nice and puts the iMac on the back foot as the "standard" of integrated machine design. It's subjective yes, but I prefer the consistently thin than really thin at edges and really thick in the middle of imac.
(b) Windows 10... I really don't like 10, and if that device had 8.1 available, I'd be interested but obviously that'll never happen.
(c) Price - it's too expensive. You can't compare to the iMac as iMac has sod all of the hardware capability - eg touch, pen, the actually-makes-sense-for-some-uses dial, plus the iMac has older processor/memory/storage tech IIRC - when they announced it it sounded like $3000 got you i7, 32GB RAM, 2TB storage - at that price, great deal, really good. But actually it's more like $4200 - and you still have to pay for the dial (unless you pre-order right now).
(d) Graphics - the choice of graphics is a bad one - it's not a current/new variant so sadly that reduces the meaningful lifespan on a device of this type more than any other - real shame.
...but sadly Windows 10 really smacks (for my purposes/interests, I realise not everyone agrees) and pushed me to Apple for the first time in years. So far, can't say I'm upset or wanting to come back to Windows.