There's another incentive to upgrade your PC to Windows 10 if you live in the US. Microsoft is holding a contest for those folks, where the grand prize winner will get a trip to New York City to attend the opening of the new Microsoft Store on 5th Avenue.
The official rules say that a person who enters the contest "must be current Windows 7, 8 or 8.1 user at start of promotion and upgrade to Windows 10 during the promotion period." The contest is also open just to residents of the US who are age 18 or over. Entries must be turned in by September 30. You can also earn additional sweepstakes entries by sharing the news on Facebook or Twitter.
The winner will not only get a trip for two to NYC to attend the Microsoft Store opening, he or she will also get some hardware as well, including a Surface Pro 3, an Xbox One console and a Microsoft Band. Finally, the winner will get a meet-and-greet with the music artist or band that will be performing as part of the Microsoft Store opening, who has yet to be announced.
By the way, the drawing for the trip will happen on or about October 14, and the rules say that the trip has to be booked at least 21 days ahead of time. That would mean the opening of the NYC Microsoft Store likely won't happen until at least early November.