Even that can get a bit tricky at times. For example, I have a Marantz player that supports multiple DVD regions but will only perform a PAL -> NTSC or NTSC -> PAL conversion using the component outputs, not the HDMI. Basically, the analog chipset they use supports this so they include it, but...
And you are basing this on actual knowledge of what various TV manufacturer's support, or what you believe that is reasonable that they would support this capability? I ask because I looked into this a year ago and that is not what I found. Generally a TV is considered muli-system capable when...
I don't believe PAL or NTSC enters the discussion regarding standard Blu-ray disks unless there is specific extra content that is not already 1080/24. So any HD TV should be fine playing Blu-rays from other regions. However, I wouldn't assume most modern non-CRT TVs can handle both PAL and NTSC...