Over the next year, a lot of things changed.
Standard British Bomber of 1938.
Standard British Bomber of 1939.
Standard British Fighter of 1938.
Standard British Fighter of 1939.
That one year made a lot of difference. Two more battleships were commissioned in 1939 (HMS King George V, and HMS Prince of Wales) with three more nearing completion. Britain's first 'modern' Aircraft Carrier by the standards of the day, was only commissioned near the end of 1938, and the next four were still building through 1939. That one year that Chamberlain gained made a huge difference.
Yes, he hoped to avoid war. But he also helped put in place a vastly improved mechanism to fight it.