It's no surprise that hotspot use is growing, especially with more and more laptops having WiFi cards built in, and more devices like PDA's having it also.
The real striking and very important statistic though is how the use of WiFi and broadband at hotels is growing. As a frequent traveler at many hotels I'm finding the big issue at hotels as:
1. Speeds being horrible
2. Latency being a problem
3. NAT Traversal being an issue due to the way access points and routers are networked.
Until hotels fix those problems, consumers will not be having an optimal experience with WiFi.