Oh right, because that experience sucks mightily. I have this lovely full color screen that can display menus, location and delivery times, let me search by cuisine, choose various customizations, etc etc. Then a "magic" computer sends the orders to the restaurant via an already configured and tested system so they are expecting an order and can fill it quickly and efficiently.
Or alternatively, thanks to this innovative new startup, I can SMS to some random number and say "I want food or something do you have any burritos" and then have them text me back, etc, etc.
BUT WAIT says the new startup. IT'S NOT JUST BURRITOS, in fact it's not just food. You could ask for a burrito today and a flight to Cancun tomorrow, and you only have to put one phone number in your address book.
Aha, the real value proposition emerges. This startup uses their proprietary technology to know that Seamless or Instacart or Expedia exist already, and then they use it for me. Except it takes twice as long, without the UI/UX those services have perfected, and costs 30-50% more money.
Step one: Landing page
Step two: Corner the market on taking SMS messages and using them to punch orders into existing apps, using skilled college graduate US based labor.
Step three: VC/YC EXPLOSION
Step four: Profit