It has the same issues. All the editing, effects etc... were done on Video just like TNG so it would be alot of work to turn DS9 into HD just like TNG. The same goes for Voyager. Enterprise is HD ready already I believe.
I predict Enterprise
will be released on Blu-ray in HD in late 2010 or 2011 (to fill time before the STXII
film is released) No other Trek TV series can be released in Blu-ray unless all the work that has been discussed on this thread and this thread
is done to remaster it to HD.