Alcohol-free wine tastes like regular wine in many ways. They go through the same vinification process as regular wine, so non-alcoholic wines can have flavors, aromas, dryness, tastes and mouthfeel just like regular wine. However, because alcohol is the transporting medium of some of these bouquets, they may be slightly less intense.
For example, a non-alcoholic variant of a regular wine may be thinner and lighter in the mouth than the regular wine. Also, based on whether the winemaker added grape juice to the dealcoholize wine, non-alcoholic wine may be sweeter than their alcoholic counterpart of the same varietal. You may also experience more fruity flavors or different types of aromas. For example, the non-alcoholic Ariel Cabernet Sauvignon is full-body and possesses a similar taste and dryness as regular red wine.
Most of the time, alcohol-free wine tastes the same as regular wine. Whether non-alcoholic wine tastes good depends on your taste and preference for wine.