I don't think NTSC tuners are relevant to the determination of HD-ready... it's just about DIGITAL tuners... HD-ready has none, intergrated HDTV does.
16:10 formats are meant for graphics workstations that edit HDTV... puts the working image up & still has room for a small tool pallette on screen.
All formats are converted to the native res of the TV for display. Format conversion is never perfect... the new 1080p/60 displays are the ultimate since both 720p/60 and 1080i/30 can be upconverted without dataloss. Cross conversion of 720p <-> 1080i has different issues depending on the direction it's going...
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