The HDMI cable arrived today, so I hooked the EVO up to my TV and tried it...
This is a picture of my TV with the EVO hooked up through the HDMI input.
It's playing the same video that I uploaded to YouTube yesterday.
I've seen some reports about the output looking a little grainy on the TV and I'd have to agree, but I don't think you can expect it to look better than what was taken with the phone. It's still HD and it looks great. I don't think you'll be making any apologies to your friends when they see themselves on TV from a video made with your phone, either. Instead, I think they'll be awestruck.
For those that haven't ordered the HDMI cable yet, the link that cary328is gave is the correct one. Here's the information from his post:
Arrow Electronics - North American Components (NAC)
Put part # 687860003 in the search box.
The cable is 6.56' long and costs $8.40 + shipping
There was some opposing views on the cable length, so I measured it and Cary was right on.
Edit: I just ran the slideshow option from the gallery and the pictures look just about as good on TV as they do on my computer. So that means you and your family can watch slideshows and videos taken with you phone.
I ran a YouTube video and it didn't show up on the TV. That probably has something to do with sensing a 720p connection?