Gamers wanting GTA V for PC is no suprise, so it wouldn't be a leap of logic for Rockstar to make a PC version like they did for GTA IV. Well maybe not exactly the same. it was an infamously buggy mess for more than a few months and is still a tempermental game to run. This does not mean however that Rockstar can't work some of the magic they run on consoles this time round.
A page on the French Amazon has appeared claiming GTA V is coming to PC. While not much can be read into this for now, it could be an indicator that Rockstar has been developing for consoles and PC alongside each other, unlike the staggered release of GTA IV. For the moment though it is probably best to take this as a hopeful sign, rather than an announcement.