that depends of each user and each hardware/software configuration, so test by yourself and you will know the real answer.
Just out of curiosity, Whats with the "Version 2003" when viewing the "Whats New" section of this build? Windows 2003 on steroids? lol
2003 follows the naming scheme that Microsoft has been following, but I hope they don't for obvious reasons.
What is the source, any reason for the post or trolling? Most likely a new build should be out on Wednesday -Thursday anyway.
If anyone wants to see what rounded corners would look like on Windows 10. look at the Bing Home Page. it has had rounded corners for a while now.