FWIW, w/the not-very-useful recent unveiling in Vegas w/no details, Toyota hasn't even acknowledged whether or not there will be a Gen 4 PHEV Prius (PiP).
I'm a Prius fan and I also don't like bizarre rear styling. I don't like the speedometer in the center either. So far, w/o seeing the Gen 4 in person, it seems like it's a significant step backwards in styling from Gen 3.

BTW, if you want to read press releases,
http://priuschat.com/threads/all-worldw ... es.157653/ has some. Here's some marketing speak about the styling...

Stunning styling that subverts the conventional hybrid car image
From the bold design to the quality interior, the Prius has never had such a powerful presence. Toyota's designers were given free rein to realize their vision, and it shows.
The new model inherits the nameplate's signature triangular silhouette which, combined with a low center of gravity, results in an impressively angular yet emotional design. Flowing curves blend with aggressive cut edges that spark interest from any angle. The top of the roof has been lowered by 20 mm and moved forwards, while the engine hood has also been lowered to create a stylish outline. All improvements have been achieved with no sacrifice to interior space.
The use of new headlamps minimizes the Prius' frontal area and, at the same time, provides a striking lighting display which helps define the vehicle's distinctive character. The effect borders on being radical. Meanwhile, the bold and unique rear combination lamps express the distinctive lines of the Prius from the rear spoiler to the trailing edges of the sides.
Up to eight exterior colors are available, including "Emotional Red" which utilizes a newly developed treatment process to achieve a deep, vibrant luster that highlights the external forms.
According to Kouji Toyoshima, the model's chief engineer: "There is much more to the new Prius than a green image. The exterior has a particularly emotional appearance, thanks in part to the new platform that enables a low slung silhouette similar to a sports car."
The Prius' interior adopts advanced technology complemented by features that are functional, fun and have high visual impact. Once inside you feel immediately comfortable, cossetted and impressed by styling cues seldom, if ever, seen before in a vehicle.
A sense of quality and space is created through the wide instrument panel with its layered construction that clearly defines the "display zone", separating it from the "control zone" which is now closer to the driver. White ornamentation used in the lower sections of the cabin evokes an impression of fine bone china.