Of course as you probably know it would not be as simple as getting off the plane and practicising would need to go the licensing process http://physiciansapply.ca/practising-in-canada/
http://www.cpso.on.ca/Registering-to-Practise-Medicine-in-Ontario
Not sure having qualification as a physician adds any more points than an equivalent level of education in any other field but of course if you can get a job offer that will of course boost the points significantly.
Have you estimated your points total based on your current position ? http://www.cic.gc.ca/english/immigrate/skilled/crs-tool.asp
