Going towards higher MP has a series of ripple effects, it is not just about going to bigger MP with more details.. The hidden cost to consumers are
- Need bigger and faster CF/SD cards or FPS will suffer
- Need bigger buffer for the cam or it will reach bottle neck really fast and FPS will suffer
- Need faster computer for storage and editing
A 24MP cam writes about 30ish MB of RAW data into the card, so say you have a 100MB/S card (fastest CF card now) and base on theoretical calculations, you can write 3 RAW files per sec which only contributes to 3FPS after the buffer on the cam fills up. If you choose RAW + JPEG, that will be like 40-45MB of data writing, sure you can have two card slots RAW to one and JPEG to other but it gets expensive really fast as fast cards + big storage space = expensive.
FYI, SD 100MB/S 128GB card cost RP of USD1,500
Erm.. someone wants 40MP cam? With the fastest card now should be able to handle 1fps, you will be buying a very expensive slow ass camera.. Kinda reminds me of S3Pro/S5Pro during its time