Intercontinental Bullet Train

I woke up this morning from a dream (after a series of other dreams) in which the final phrase/moment was "TGV Around the World!". Mos def, my peeps. It would be a massive undertaking, but what if we had a pair of highest-speed rail lines that literally spanned the globe, connecting to existing rail lines at existing stations as well as being integrated into a super-fast next generation hydrofoil for ocean crossings? Boeing and Airbus could make the trains (as the trains would supplant some of the air traffic). Lots of jobs could be created, lots of fuel saved (over hundreds of years if well built), and I would buy a ticket on it just to go around the globe in record time. Ah, dreams.