The screen wipe in my opinion, is somewhat harsh. Kinda like buying a new car and driving it 100 mph for any length of time.
The slides are less harsh, but not really necessary, unless you are trying to speed up the pixel stabilization process, or if you are planning on utilizing someone else's settings, like D-Nices, and want to age the panel as they did prior to calibration, to try and get results as close as he achieved during calibration.
But there is always panel variations, so it will never be as accurate as a professional calibration, and in some circumstances, could result in worse results than the default cinema or movie modes.
You can also stabilize your phosphors by just watching tv. Just take care to take out of vivid/dynamic mode, and turn down contrast a bit, while trying to avoid black bars, heavy logos or static images for extended periods during the first few hundred hours.
It is not necessary to use slides if you are getting a professional calibration, unless as I stated, you are trying to speed up the aging process. A professional calibrator will take readings of your displays current state, and calibrate from there.
Most importantly, enjoy your display.