There's already been two big announcements already this year of office buildings getting converted.
By my count, there are 13 pre-war buildings with at least eight floors that were built as office buildings. The Historic Electric Building and Houston Place Building were converted into residential in the 1990s, followed by Neil P and T&P Terminal in the mid-2000s. Recently, the 714 Main, The Sinclair, and W.T. Waggoner buildings went hotel, and plans have been announced to convert the Bob Simpson Building too. That makes 8 of 13 that have been converted. Additionally, the Burk Burnett Building is rumored to have a conversion pending, and the Petroleum Building is currently vacant, and it seems at least part of the Star-Telegram building might go residential.
The only remaining office pre-war highrise offices that are still functioning as offices (and not mentioned above as rumored to be converted) are the Fort Worth Club Building and STS Tower. The STS Tower was recently renovated and seems unlikely to be converted for a while, and has a high occupancy from what I’ve heard. The Fort Worth Club has a nice floorplan for a potential conversion, but due to it’s integration with the 1970’s expansion of the building any conversion seems highly unlikely (though a portion of it is being used as a hotel, but it's a very small part).
I wrote a post on my site in more detail here: https://www.now.town...nversion-trends