Probate only effects a person's probate property. A will also only effects a person's probate property. As a general principal most property is considered probate property unless it specifically qualifies as non-probate property. A common example of non-probate property is property held in joint tenancy with rights of survivorship. In this case the property would pass automatically to the joint tenant.
Bank accounts with pay on death provisions.
Life insurance policies with designated beneficiaries. Retirement funds with designated beneficiaries. Certain investments and annuities. If property is non-probate than is will pass to the designated person or joint tenant without respect to probate or a will. As a result when planning one's estate one should always make sure to check all beneficiary designations and joint tenancy deeds and titles to ensure the appropriate provisions included are consistent with intent.