1) The document debunks several common myths about mobile app development, including that mobile and web development require the same skills, that PhoneGap is sufficient for enterprise apps, and that designing for offline use or slow connections is unnecessary.
2) It discusses different types of mobile apps like native, web, and hybrid and explains their tradeoffs in areas like functionality, performance, and integration with device capabilities.
3) The document emphasizes that enterprise mobility requires capabilities beyond what tools like PhoneGap provide, including backend integration, security, management of apps and devices, and support for evolving business needs.