Although a car’s exterior frequently attracts more attention than its cabin, when it came time to style the Cadillac XTS Platinum concept — which makes its world debut at the 2010 Detroit auto show — designers worked from the inside out.

“We envisioned this concept as an automotive personal headquarters,” said Brian Nesbitt, Cadillac’s general manager, “using advanced technology to enable new levels of connectivity and luxury.”

Certainly, the XTS isn’t lacking the latter. Cadillac’s taken to putting “Platinum” badges on its most upscale vehicles, and it’s safe to say this show car takes the nameplate to a whole new level. Cut-and-sewn materials (a hallmark of the Platinum range) run rampant throughout the car, as does laser-etched suede. The dashboard sports few physical buttons or gauges, relying instead on touch-screen organic LED displays instead.

Despite the attention paid to the cabin, designers thankfully didn’t neglect the exterior, either. Billed by Cadillac, as the “active evolution” of its design language, the XTS incorporates the aggressive edges found on the likes of the CTS and SRX, but mixes them with longer lines, which help to soften the sedan’s form ever so slightly. Although technically a large sedan, the XTS show car is approximately four inches longer than an STS, and four inches shorter than a normal-wheelbase DTS.

Both the high beltline and the large 20-inch wheels help to call attention to the XTS’ all-wheel-drive configuration, but what deserves more attention is what, exactly, is sending power to all four wheels. GM won’t reveal too much about the powertrain (it is a concept, after all), we’re told the XTS Platinum show car uses a plug-in hybrid system similar to that developed for the stillborn Saturn Vue 2-Mode hybrid. A direct-injection 3.6-liter V-6 is mated to an electrically variable transmission, allowing the XTS to be driven by the gasoline engine, an electric motor, or a combination of the two. Cadillac says total output is in the realm of 350 hp and 295 lb-ft of torque.

Cadillac says the XTS Platinum is simply a concept car, but it’s no secret the brand is working on a replacement for its aging STS and DTS sedans. Coincidently, the XTS physically slots in between the two sedans. Expect something similar to reach production by the end of 2012.

It’s a Lambo with extra bite! Meet the Lamborghini Insecta Concept, the brainchild of Romanian design student Iulian Bumbu. The Milan-based designer claims the car is a fusion of the Italian carmaker’s current design language and the exoskeletons, or body armour, found on insects.

Insects to be the inspiration for future Lamborghini’s? That’s what one industrial design enthusiast was thinking about when he turned up this design study of what a future Lamborghini might look like. This supercar is still the concept car and is cleverly dubbed the Lamborghini Insecta and is structurally made of carbon fiber.Rumours said,this supercar, is to be powered by the same V10 powerplant that powers the Gallardo though we’re hoping it’ll feature more power, after all, insects are capable of some pretty amazing things.

And the two-seater mid-engined supercar certainly has a bug-like quality to it – with it’s tightly-wrapped carbon-fibre bodywork, wide-set eyes and winged scissor doors.

When automakers take a concept vehicle to a motor show, they offer all kinds of information about what the future production model would come with. However, every so often a car maker, let’s say Honda shows off a concept vehicle with no details, such as the Honda Skydeck Concept.

The SkyDeck is widely seen as a potential successor to the Odyssey, Honda’s current mini-van.This vehicle was on show at the recent Tokyo Motor Show, but Honda said that this six-seat MPV Hybrid is theoretical.

The interior of the car looks like something from the future, the first two rows are cantilever mounted to a center tunnel, the second row of seats are able to slide forward and can be stored under the front seats.

How far off is the SkyDeck? Who knows. For now, it’s just a concept car – a glimmer in the eye of a few top Honda designers.