American auto maker Cadillac is showcasing the new models these days. First their CTS-V Sports Wagon appears, and now talks of a XTS Platinum concept begin.

During an interview at the 2010 Paris Motor Show, General Motors chief designer Ed Welburn said that Cadillac needs "a big halo" vehicle, which can help bring respect back for Caddy as more than an entry-level luxury brand.
Welburn said Cadillac has conducted surveys with owners of luxury vehicle, and most show an interest in a large Cadillac sedan.
"Right now they have mixed feelings about Cadillac but they see the potential," said Welburn…