Yes if you render them out at 1080i, burn them to a standard dvd-r +r disc as an m2t file (Nero data file) then play them back on an Avelink or JVC player that can play m2t files or wmv hd files. No if they are too small to begin with as the taking camera settings dictate. I usually take my still photos with a least a resolution of 2200 x 2200 so that I can zoom into the picture without getting pixelation. For normal tv's 720 x 480 at 150 dpi is enough.
On my 65" HDTV, there is a dramatic increase in PQ going from 480P to 1080i. IMHO, the picture can be quite "stunning". For my slideshows, I usually add motion (e.g. pan, tilt, zoom, rotation, perspective changes, etc.) which can affect your resolution requirement. I shoot with an 8MP digital that produces a 3264 X 2448 image and sometimes find it to be insufficient. My recommendation is to keep your resolultion as high as possible unless you're only interested in still images or very limited motion effects. Today, storage is cheap.
I made a very serious mistake some years ago when I scanned my film and slide collection. Never thinking of an HDTV future, I limited my scanning resolution to roughly a 3 MP image. Now, if I want to do slideshows from my older stuff, I will have to re-scan which is a very, very tedious process. Good luck.