One of the main IDN related topics from the just-finished ICANN meeting in Cairo that I think deserves some additional attention was:
Why Compliance with IDN technical requirements are a necessity on a global scale
Overall compliance with technical standards are important for TLD registry operators in order to keep their TLD stable and secure and in that way function and work well for their consumers and communities. Per ICANN Bylaws, interoperability of the Internet is a core value, which requires that technical standards are complied with. In some instances failure to comply with technical standards will only affects the corresponding TLD in isolation and does not interfere with other TLDs – when moving to the topic of IDN TLDs however this fact changes very quickly.