I didn't like the picture quality (running 1080P) on ROKU v. my new model X1 box.
And I ran the ultra box with ethernet, not wiffy
It had some odd motion blurring especially noticeable when faces were moving.
That's odd. IME, picture quality on my Roku is excellent with HD content, even with me throttling the Roku's bandwidth to measly 3.5 Mpbs.
Then again, my TV is a 10-year-old 55" Samsung, so maybe not exactly mind-blowing quality by today's standards.