According to IGN, CW, and other sources, Smallville season 10 will be the last season after nearly 10 years being on air. Smallville sure had its ups and downs. It was thought that moving Smallville on Fridays for season 9 would be the death of the series, but surprisingly, season 9 has been the strongest season of Smallville since the first few seasons. And while Smallville isn't the traditional sense of the mainstream universe, its still has been entertaining.
 
When you think about it, it was coming. What more could be added in Smallville without going too far, besides the obvious Clark still needs to fly? This is also amazing as well: A superhero tv series going on for 10 seasons. After the writer strike in Season 7, I wasn't sure if Smallville would survive for a season 8. Heroes eat your heart out.
 
Even with that tease of the season finale "Salvation", with Season 10, will we finally see Clark in the traditional suit? Will he finally become The Man of Steel? Will he finally fly? Another huge question is, Will Darkseid make an appearance? I think the greatest way to end the series is to see Clark in the traditional suit standing on the Daily Planet looking at the sun, or flying towards it. Something that makes you feel good inside.

im glad they know in advance now they can end it how they want to and its time for him to be superman

Agreed. Clark is finally accepting his destiny to be a hero. Season 10 should end in a high note.