Sometimes a simple walk outside can mean so much. Even if it’s not quite the real thing. Last December, Roberta Firstenberg died of cancer at the age of 76. Before the throat tumor formed, her granddaughter Priscilla said that Roberta loved to travel and garden. She baked cookies. She was known for her delicious banana bread. But cancer ultimately robbed Roberta of her ability to travel or ride in a car without great pain. Even the vibrations from being pushed in a wheelchair proved too much. That’s when Priscilla, a 29-year-old video game artist, reached out to Oculus Rift’s customer