It’s an interesting idea, but I’m not convinced the average person has any interest in texting or talking out loud to their device to complete all their computing tasks. It’s slower for most things.
Also I think there will be little interest in delegating that level of control to a single source for anything that’s important. For example, say I’ve got 5k to spend on home theatre gear, why on earth should I trust Shopify’s AI to suggest what I need and find the best price? The incentives aren’t in alignment.