I've thought about doing this myself but my GMail account is so ingrained in everything I don't think I'd be able to untangle the mess.
Are there any big issues you see coming up with doing this, long standing accounts not letting you change email, etc?
Do you plan on keeping the old account around for a period to catch any services you might have forgotten about?
Be interesting to see a follow-up once you're done to see what kind of pain it causes.
I believe that if the president is incapacitated in any way the Vice President becomes Acting President. I guess they could stay in that role until the end of the term but if expect they'd use their new power in some fashion to make it more permanent.