Conventional wisdom says that no TV can ever be "too big," but they can only be "too expensive." The new Xiaomi Mi TV 3S comes in 55" and 65" sizes and are some of the cheapest 4K sets money can (soon) buy. And they support HDR, which most early 4K TVs do not and is often touted as the bigger upgrade to image quality than the resolution boost. The 55" TV uses panels from LG while the 65" ones are sourced from Samsung. They cost CNY 3,500 ($525) and CNY 5,000 ($750) respectively, though getting them out of China will be tricky. Affordable as they are, we think the CNY 6,000 ($900)...
Source: http://www.gsmarena.com/xiaomi_mi_tv_3s__55_and_65_4k_tvs_with_hdr_and_great_audio-news-20726.php