The big deal with Dyson’s new vacuum is how small it is. While “pencil” is certainly an ambitious noun to compare a floor vacuum to, the slender body of the PencilVac Fluffycones ($600) brings to mind mops and brooms rather than hulking cyclone-suction tech and connected cleaning. As we described it last year, it’s the company's most stick-like stick vacuum yet. Dyson has been repurposing its engine tech into smaller form factors for years, such as its hair dryers. However, this is the first time it’s been utilized for floor cleaning. Dyson recently launched the PencilVac Fluffy, with a more traditional dual-roller system, but I’m focusing on the Fluffycones iteration and will call it simply the PencilVac for brevity. It combines several delightful design features, and while surprisingly potent, it’s — predictably — not quite able to match the power of its bigger brothers. The entire vacuum weighs under four pounds, which adds to its ease of use.…