I think it's more of a case of having too! The new stadium could be years away given that even an outline application hasn't been made yet! Access needs to be sorted other parties, funding etc! I reckon it could be at least 6 or 7 years away.
The costs of developing Sincil Bank go way beyond the simple exercise of extending the stadium the infrastructure upgrades will be seriously expensive but I think what Roger was alluding to last night is let's actually do some groundwork to find out what those costs could be.
Once you have some numbers you can crunch them. If we keep progressing we seriously need a bigger stadium and that's looking sooner rather than later. We could extend Sincil Bank say by making the St Andrews stand full length and adding maybe 2,500 - 3000 seats way quicker than any stadium move would happen.