On the one hand, Arrow is extremely well made and this is no perverted sappy superhero like Smallville was. In other words, it's a straight up superhero show that doesnt make any excuses and doesnt get watered down in some way because of TV. I assume Flash and Constantine will be good too.
But...
First of all, Arrow is very batman-like. He uses a lot of his villains, his methods, and all that. Plus he uses Waller and Argus and i'm sure the movies will want to use them too without having to worry about what Arrow has done with them. It would be extremely confining for the show if it had to tread lightly so as not to "disturb" characters that the movies might need to use. And the shows need to have 24 episodes per season, they cant be standing still in case the movieverse wants to do something will Waller or Deathstroke. And even Arrow and Flash themselves will have more development because they have so much more time than the movies have.
So while yes, Arrow (and hopefully flash) is very well made, i think it would be really complicated to synergize a series of movies that come out every 2-3 years with a tv show that has 24 episodes per year, and which needs constant plots, villains and other characters to keep going. Keep the movieverse and the TVverse separate, they'll be able to breath and work better this way.