I play also on Xbox360 and I found my graphics very good!!!

I play on a PC-flatscreen (LCD, not plasma or whatever) of 19 inch (Samsung - Sync Master 930 BF). I look realy beautiful for me!
I the beginning I began play my playscreen wasn't not so good, but a little search for the good resolution (I play now with a screenresolution of 1024 by 768 pixels - colourquality on highest (32 bits))
... and so on, it play nice since that time.
I agree, the graphics aren't the same quality as on pc, but for me, more than enough good looking graphics!!

I love this game so much !! Must it be this game was on 2 Dimensional (like DD or BD), I would play it also for sure!!! Quests, gameplay, fun, music, storyline, hidden dungeons or places to go, voice-acting and so more on, I find D II fantastic !!

On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin,
it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !