Like it or not, IDN has a significant role to play, addressing some fundamental needs of end users. It's all about demand and supply, simple as that.
Its also about functionality and relevance for your search.
IDNs are simply just regular domains in "your" daily use language.
soccer.com in English is what "we" may prefer, here are some soccer (football) foreign equivalent displayed as IDNs.
IDNs are just regular domains, in various languages and still using .com, .net, .jp, .tv, etc.
No mystery here as to what non-English speaking internet users in China, Egypt, Thailand or Korea might prefer for their domains or searches. Not to mention what advertiser$ will be able to do with them.
fútbol.com Spanish "fútbol" 38,300,000 google
ÑÑÑбол.com Russian "ÑÑÑбол" 29,800,000 google
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.com Arabic 1,380,000 google
è¶³ç.com Chinese "è¶³ç" 62,600,000 google
ãµãã«ã¼ .com Japanese "ãµãã«ã¼" 59,700,000 google
ì¶êµ¬ .com Korean "ì¶êµ¬" 23,400,000 google
à¸à¸¸à¸à¸à¸ªà¸¥.com Thai "à¸à¸¸à¸à¸à¸ªà¸¥" 605,000 google
soccer.com English "soccer" 177,000,000