What is the relationship between within and virtual reality in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Yet WiFi is just the tip of the iceberg and perhaps the most simplistic offering in the technology race among hotels, which now includes robots to gather guest luggage, biometric PayTouch systems, iPads to control everything from room lighting to music, self-service kiosks for check-in and virtual reality experiences within rooms.

Answer: industry