CGI, like the rest of the film/tv industry, will go where the money is best. There is nothing in film/tv production that cannot be loaded into a truck and shipped elsewhere overnight ... people included. Work is moving to canada for the tax credits but you'd be surprised at how many "canadian" productions are actually filmed overseas. TheBorgias was canadian. Versailles, filmed in france with brit actors, is supported by the canadian government and RBC (my bank) no doubt for some tax advantage. Even the first season of the Doctor Who reboot in 2005 was a joint production with the CBC. Check the credits. No matter where it is filmed, canada supports it.