I think the sole reason M1 is in the iPad Pro is because it's cheaper for Apple to manufacture one type of processor to be used across as many product lines as it can stuff it into, rather than tailoring the CPU to the specific task.
I don't believe it represents any kind of philosophical merging of iOS / MacOS - it's simply a decision made on a spreadsheet to maximise profits.
The big 'news' from M1 in iPad Pro is that going forward it looks like iPad Pros will use the low cost / low power Mac CPU, rather than a beefed up iPhone CPU. I bet the lower cost iPads will continue to use the iPhone CPU, with no extra horsepower.
So the benefit for Apple is that it no longer has to design and produce a specific iPad CPU at all!
So iPads will never have a CPU specifically designed for iPad use alone, but past experience shows this is probably fine - iPhone CPUs are powerful enough and M1 shows that Mac CPUs can be sufficiently power efficient.
Reading this strategy across to other Apple products, since Apple is not tailoring CPUs to each product line, I think we can expect 'M2' to be used in all of the other Macs due to move from Intel - i.e. high-end Mac Mini, high-end iMac, high-end MacBook Pro 13/14 and MacBook Pro 16, with the only real differences being form factor and cooling. Mac Pro is the only one where it's not clear that would work.
And IMHO M1 is all around great, but iOS is only great sometimes. iOS Multitasking is terrible - both unintuitive and poorly supported. Getting that sorted seems fundamental to moving iOS beyond casual use for most. File management is bad too.
Then we have the limits of the App Store as to what kind of apps can be published (e.g. web browsers all having to share the same Safari underpinnings ) or which are economic to publish with Apple's cut. I just don't think the iOS ecosystem is geared to Pros and Pros are too small a slice of the market for Apple to really care about to fix it.
I don't believe it represents any kind of philosophical merging of iOS / MacOS - it's simply a decision made on a spreadsheet to maximise profits.
The big 'news' from M1 in iPad Pro is that going forward it looks like iPad Pros will use the low cost / low power Mac CPU, rather than a beefed up iPhone CPU. I bet the lower cost iPads will continue to use the iPhone CPU, with no extra horsepower.
So the benefit for Apple is that it no longer has to design and produce a specific iPad CPU at all!
So iPads will never have a CPU specifically designed for iPad use alone, but past experience shows this is probably fine - iPhone CPUs are powerful enough and M1 shows that Mac CPUs can be sufficiently power efficient.
Reading this strategy across to other Apple products, since Apple is not tailoring CPUs to each product line, I think we can expect 'M2' to be used in all of the other Macs due to move from Intel - i.e. high-end Mac Mini, high-end iMac, high-end MacBook Pro 13/14 and MacBook Pro 16, with the only real differences being form factor and cooling. Mac Pro is the only one where it's not clear that would work.
And IMHO M1 is all around great, but iOS is only great sometimes. iOS Multitasking is terrible - both unintuitive and poorly supported. Getting that sorted seems fundamental to moving iOS beyond casual use for most. File management is bad too.
Then we have the limits of the App Store as to what kind of apps can be published (e.g. web browsers all having to share the same Safari underpinnings ) or which are economic to publish with Apple's cut. I just don't think the iOS ecosystem is geared to Pros and Pros are too small a slice of the market for Apple to really care about to fix it.