Classical music has evolved over the years for many reasons, one being its adaptability for hybridized genres. The success of Hauser (born Stjepan Hauser) is a testament to that, as the Croatian cellist has nimbly blended his pop and rock influences with his four-stringed companion over two decades. Local entertainment devotees may recognize him from his stint in Elton John’s backing band during the English superstar’s Million Dollar Piano residency at the Colosseum. Lately, he’s been touring arenas with a show that adds even more genre blends to the mix, including Latin and soundtrack music. Las Vegas will get a more intimate Hauser show at the 1,480-seat Encore Theater.