Your in-store omnichannel has to deliver...or else
According to this article by multichannel merchant, customers are receptive to in-store conveniences like in-store pickup for online purchases, so long as it is totally glitch free. If it's not, you're probably better off not doing anything at all.
In the case of in-store pickup, a retailer has a 15 minute window to satisfy the customer. Anything longer than that and the customer experience nosedives extremely quickly.
This puts bricks and mortar at a slight disadvantage, as these services are so far unprecedented, and there will always be a learning period for retailers and the vendors that sell these solutions. This is why you should allow plenty of time to test, like we do with our smart-stand.