I don't think it's enough for taxis to just build a comparable app/infrastructure at this point. Uber goes beyond now, offering perks when you take Uber to specific destinations (eg a free burger at one place, free drink at a specific bar, etc). My UberX driver last night gave me a free bottle of water and let me drink it in the cab. Taxis could do all this, but they don't seem interested in providing that level of service.