Cautiously optimistic..
The new cleaner head looks nice, but I noticed the self-adjusting "bellows" are gone, so it's just sits on the carpet like the older models. If the brushbar is designed to still spin when cleaning bare floors, that means the brushbar will need to be really gentle, or hardly protrude from the sole-plate at all (sadly the latter is the likely scenario). If that's the case, the carpet cleaning performance will yet-again be compromised, despite looking like it means business. However, if that isn't the case, and the machine just has a huge aggressive brushbar that does an awesome job, then it looks like a winner. Dyson claims it's much quieter too!
I wonder if this model was made to meet the new stricter EU energy regulations? If so, the US likely won't get the same machine. We never got the lower-consumption MK2 models, but instead similar variants.
I'm still waiting to see Dyson's nifty self-cleaning shroud on one of their uprights!