My guess is real estate will be disrupted long before Wall Street.

Having worked in both finance and real estate, the parallels between real estate transactions and I-banking deals are shockingly similar, only I-banking deals are much more complex and high stakes. If you think investment bankers will soon be out of work, you should also be betting the real estate broker as a profession will be eradicated the way eTrade destroyed the old school retail stock broker.

Sadly, right now I'd take the other side of the trade for the next 5 years (long Wall Street, short startups trying to disrupt M&A). When amateurs engage in very complex and high stakes deals, such as buying or selling a house priced more than their net worth, they tend to want professional hand holding, among many, many other things.