im sure there will be some driver or game glitches... its a new thing, barely anybody plays games with 2 or even more displays... but it should work alright for most games seeing as it merges the screens into one big display virtually...

the menu being partly hidden by the borders between the displays is the biggest problem i can think of... and the crossbar being centered and thus hidden or shown cut in half on both screens is annoying too...

there are bezel less displays, its really not that dificult from a technical point of view... so i dont get why there arent more displays without bezels....
i think the display makers think it doesnt matter and its not worth the 10-20% higher cost... i hope we will see some propper displaus without bezel soon... those samsung displays are a joke... there already are displaus with such a small and even smaller bezels afaik...