For example, I'm reincorporating my company and talked to a startup lawyer this week. Did you know that if you incorporate in this calendar year, if you hold on to your stock in your company for 5+ years, you pay no capital gains taxes up to $10 million. Basically, if you ever sell your company many years from now, you have some big upside. It's not guaranteed that Congress will grandfather in 2014 for this rule. Once again, I am not a lawyer and only paraphrasing.
It's this example and dozens of other things you might not know and could potentially hurt you in the future. But glad you're getting it taken care of.
Just as a trivial example of what the lack of incorporation can cause, my neighbor decided to open a dance studio, foolishly signed a 5-year lease for a space that was unrealistically expensive, and proceeded to fail. She was threatened with a lawsuit to collect the rent. Rather than declare personal bankruptcy which would drag her husband down as well, she negotiated a deal to keep paying some portion of the rent, and had to find a part-time job to raise the money. No more business, and now indentured to some sleazy landlord, all because she didn't think to form an LLC at the outset.