Love Story 2050 (2008)

It's a story about Karan (Harman Baweja), a young spirited sporty boy who lives life off the rules, and Sana (Priyanka Chopra), a young petite, shy girl who lives life by the rules. Their interaction thus develops into a magical love story.

Karan's uncle Dr. Yatinder Khanna (Boman Irani), a whacky scientist has been working on the time machine for years which one day finally, works! Sana expresses her wish to travel time to Mumbai in the year 2050.

What they see in future is a spectacular city with flying cars, 200 story buildings, robots, and sky rails that have changed the very face of Mumbai and the world! The two kids Sana's brother and sister who have also traveled with them find the new world fascinating. 

Through a series of twists and turns, the time traveler Karan finds himself separating from his love QT. A friendly femme robot and Boo, a small robotic teddy bear play their distinct roles in bringing the love story of Karan and Sana together but soon they find themselves under the threat of the demi-god of the future, Dr. Hoshi.
Will Karan be able to overcome the threat of Dr. Hoshi and win his love and travel back in time?

(From the official press booklet)