Hi,
That monitor is pretty low-res for its size... 1366 x 768 is low for a 26" screen (1024 x 768 is adequate for a 15" 4:3 display usually, so imagine what happens to the size of each pixel when the screen size gets bigger and the resolution doesn't).
And while it may be OK for 720px HTDV, it'll be of no real use for 1080px HDTV as it'll have to do some mangling to drop the extra resolution it's not capable of displaying.
But as an Amiga monitor, it'd be more than enough!
- Ali